Proposal for a Council Decision on the accession of the European Community to Regulation 108 of the United National Economic Commission for Europe concerning the approval for the production of retreated pneumatic tyres for motor vehicles and their trailers
27. 6. 2000 EN Official Journal of the European Communities C 177 E/47 Proposal for a Council Decision on the accession of the European Community to Regulation 108 of the United National Economic Commission for Europe concerning the approval for the production of retreaded pneumatic tyres for motor vehicles and their trailers (2000/C 177 E/08) (Text with EEA relevance) COM(1999) 728 final - 2000/0002(AVC) (Submitted by the Commission on 6 January 2000) THE COUNCIL OF THE EUROPEAN UNION, Having regard to the Treaty establishing the European Community, Having regard to Council Decision 97/836/EC of 27 November 1997 with a view to accession by the European Community to the Agreement of the United Nations Economic Commission for Europe concerning the adoption of uniform technical prescriptions equipment and parts which can be fitted to and/or be used on wheeled vehicles and the conditions for reciprocal recognition of approvals granted on the basis of these prescriptions (1) (árevised 1958 Agreementí), and in particular Article 3(3) and the second indent of Article 4(2) thereof, for wheeled vehicles, Having regard to the proposal by the Commission, Having regard to the assent of the European Parliament, pneumatic tyres while ensuring a high level of safety and environmental protection. (2) Regulation 108 has been notified to the contracting parties and entered into force in respect of all the contracting parties who did not serve notice of their disagreement by the date or dates specified in the regulation annexed to the revised agreement of 1958. (3) In order to enable the economic operators to take appro- priate measures to abide in time by the provisions of Regu- lation 108 so as not to disrupt the market in retreaded pneumatic tyres, in particular by dates of entry into force that could differ from one Member State to another, the uniform application of the Community will be regulated later through a Community directive. However, Regulation 108 will not be integrated in the system for type-approval of motor vehicles and their trailers, regulation throughout this Whereas: HAS DECIDED AS FOLLOWS: (1) The aim of the uniform provisions of Regulation 108 of the United Nations Economic Commission for Europe concerning the approval for the production of retreaded pneumatic tyres for motor vehicles and their trailers is to abolish the technical barriers to trade in motor vehicles between the contracting parties with regard to retreaded Sole article The European Community accedes to Regulation 108 of the United Nations Economic Commission for Europe concerning the approval for the production of retreaded pneumatic tyres for motor vehicles and their trailers (2). (1) OJ L 346, 17. 12. 1997, p. 78. (2) Cf. document E/ECE/324-E/ECE/TRANS/505/Rev. 2/Add. 107. C 177 E/48 EN Official Journal of the European Communities 27. 6. 2000 REGULATION No 108 of the Economic Commission for Europe of the United Nations (UN/ECE) UNIFORM PROVISIONS CONCERNING THE APPROVAL FOR THE PRODUCTION OF RETREADED PNEUMATIC TYRES FOR MOTOR VEHICLES AND THEIR TRAILERS (E/ECE/324-E/ECE/TRANS/505/RØv. 2/Add. 107) 1. SCOPE This Regulation applies to the production of retreaded tyres intended to be fitted to private (passenger) cars and their trailers used on the road. It does not however apply to: 1. 1. 1. 2. 1. 3. 1. 4. 1. 5. 1. 6. 1. 7. 1. 8. 2. 2. 1. 2. 2. 2. 2. 1. 2. 2. 2. 2. 2. 3. 2. 3. 2. 3. 1. 2. 3. 2. 2. 3. 3. 2. 3. 4. 2. 4. 2. 5. 2. 6. 2. 7. 2. 8. 2. 9. Retreaded tyres for commercial vehicles and their trailers. Retreaded tyres with a speed capability below 120 km/h or above 240 km/h. Tyres for cycles and motorcycles. Tyres originally produced without speed symbols and load indices Tyres originally produced without type approval and without either an Eí or áeí mark. Tyres designed for the equipment of cars produced prior to 1939. Tyres designed exclusively for competition or off road use and marked accordingly. Tyres designated as T typeí temporary use spares DEFINITIONS - See also figure in annex 8 For the purpose of this Regulation: Range of retreaded pneumatic tyresí means a range of retreaded pneumatic tyres as quoted in paragraph 4. 1. 4. Structureí of a pneumatic-tyre means the technical characteristics of the tyre’s carcass. The following structures are distinguished in particular Diagonalí or Bias plyí describes a pneumatic-tyre structure in which the ply cords extend to the beads and are laid at alternate angles substantially less than 90° to the centreline of the tread. Bias beltedí describes a pneumatic-tyre structure of diagonal (bias ply) type in which the carcass is stabilised by a belt, comprising two or more layers of substantially inextensible cord material laid at alternate angles close to those of the carcass. Radialí describes a pneumatic-tyre structure in which the ply cords extend to the beads and are laid substantially at 90° to the centreline of the tread, the carcass being stabilised by an essentially inextensible circumferential belt. Category of useí Normal tyre is a tyre intended for normal road use only. Snow tyre is a tyre whose tread pattern, or tread pattern and structure, is primarily designed to ensure, in mud and fresh or melting snow, a performance better than that of a normal tyre. The tread pattern of a snow tyre generally consists of groove (rib) and solid block elements more widely spaced than on a normal tyre. Temporary use spare tyre is a tyre different from that intended to be fitted to any vehicle for normal driving conditions but intended only for temporary use under restricted driving conditions. Tí type temporary use spare tyre is a type of temporary use spare tyre designed for use at inflation pressures higher than those established for standard and reinforced tyres. Beadí means the part of a pneumatic-tyre which is of such shape and structure as to fit the rim and hold the tyre on it. Cordí means the strands forming the fabric of the plies in the pneumatic-tyre. Plyí means a layer of árubberí coated parallel cords. Beltí applies to a radial ply or bias belted tyre and means a layer or layers of material or materials underneath the tread, substantially in the direction of the centre line of the tread to restrict the carcass in a circumferential direction. laid Breakerí applies to a diagonal ply tyre and means an intermediate ply between the carcass and tread. Chaferí means material in the bead area to protect the carcass against chafing or abrasion by the wheel rim. 27. 6. 2000 EN Official Journal of the European Communities C 177 E/49 2. 10. 2. 11. 2. 12. 2. 13. 2. 14. 2. 15. 2. 16. 2. 17. 2. 18. 2. 19. 2. 20. 2. 21. 2. 21. 1. 2. 21. 2. 2. 21. 3. Carcassí means that structural part of a pneumatic-tyre other than the tread and outermost árubberí of the sidewalls which, when inflated, supports the load. Treadí means that part of a pneumatic-tyre which is designed to come into contact with the ground, protects the carcass against mechanical damage and contributes to ground adhesion. Sidewallí means the part of a pneumatic tyre between the tread and the area designed to be covered by the rim flange. Lower area of tyreí means the area included between the line of maximum section width of the tyre and the area designed to be covered by the edge of the rim. Tread grooveí means the space between the adjacent ribs or blocks in the tread pattern. Principal groovesí means the wide grooves situated in the central zone of the tread, which cover approximately three-quarters of the breadth of the tread. Section widthí means the linear distance between the outside of the sidewalls of an inflated pneumatic-tyre, when fitted to the specified measuring rim, but excluding elevations due to labelling (marking), decoration or protective bands or ribs. Overall widthí means the linear distance between the outside of the sidewalls of an inflated pneumatic-tyre, when fitted to the specified measuring rim, and including labelling (marking) decoration or protective bands or ribs. Section heightí means a distance equal to half the difference between the outer diameter of the tyre and the nominal rim diameter. Nominal aspect ratioí means one hundred times the number obtained by dividing the number expressing the nominal section height by the number expressing the nominal section width, both dimensions being in the same units. Outer diameterí means the overall diameter of an inflated, newly retreaded tyre. Tyre size designationí means a designation showing: The nominal section width. This must be expressed in millimetres, except in cases of tyres for which the size designation is shown in the first column of the tables in annex 5 to this Regulation. The nominal aspect ratio except in cases of tyres for which the size designation is shown in the first column of the tables in annex 5 to this Regulation. A conventional number ádí (the ádí symbol) denoting the nominal rim diameter of the rim and corresponding to its diameter expressed either by codes (numbers below 100) or in millimetres (numbers above 100). Numbers corresponding to both types of measurements may be used in the designation. 2. 21. 3. 1. The values of the ádí symbols expressed in millimetres are shown below: Nominal Rim Diameter Code - ádí Value of the ádí symbol expressed in mm 8 9 10 11 12 13 14 15 16 17 18 19 20 21 203 229 254 279 305 330 356 381 406 432 457 483 508 533 2. 22. 2. 23. 2. 24. Nominal rim diameter (d)í means the diameter of the rim on which a tyre is designed to be mounted. Rimí means the support, either for a tyre-and-tube assembly or for a tubeless tyre, on which the tyre beads are seated. Measuring rimí means the rim specified as a ámeasuring rim widthí, or ádesign rim widthí for a particular tyre size designation in any edition of one or more of the International Tyre Standards. C 177 E/50 EN Official Journal of the European Communities 27. 6. 2000 2. 25. Test rimí means any rim specified as approved or recommended or permitted in one of the International Tyre Standards for a tyre of that size designation and type. 2. 26. International Tyre Standardí means any one of the following standard documents: (a) The European Tyre and Rim Technical Organisation (ETRTO) (1): Standards Manualí (b) The European Tyre and Rim Technical Organisation (ETRTO) Design Information - áobsolete dataí 2. 27. 2. 28. 2. 29. 2. 30. 2. 31. 2. 32. 2. 33. (c) The Tire and Rim Association Inc. (TRA) (2): Year Bookí (d) The Japan Automobile Tire Manufacturers Association (JATMA) (3): Year Bookí (e) The Tyre and Rim Association of Australia (TRAA) (4): Standards Manualí (f) The Assiciacao Brasileira de Pneus e Aros (ABPA) (5): Manual de Normal Technicasí (g) The Scandinavian Tyre and Rim Organisation (STRO) (6): Data Bookí Chunkingí means the breaking away of pieces of rubber from the tread. Cord separationí means the parting of the cords from their rubber coating. Ply separationí means the parting of adjacent plies. Tread separationí means the pulling away of the tread from the carcass. Tread wear indicatorsí means the projections within the tread grooves designed to give a visual indication of the degree of wear of the tread. Service descriptioní means the specific combination of the load index and speed symbol of the tyre. Load indexí means a numerical code which indicates the maximum load the tyre can support. The list of load indices and the corresponding loads are shown in annex 4 to this Regulation. The tyre standards can be obtained from the following addresses: (1) ETRTO, 32, Av. Brugmann-Bte 2, B-1060 Bruselas. (2) TRA, 175 Montrose West Avenue, Suite 150, Copley, Ohio, 44321 Estados Unidos de AmØrica. (3) JATMA, 9th Floor, Toranomon Building n° 1-12, 1-Chome Toranomon Minato-ku, Tokio 105, Japón. (4) TRAA, Suite 1, Hawthorn House, 795 Glenferrie Road, Hawthorn, Victoria, 3122 Australia. (5) ABPA, Avenida Paulista 244-12° Andar, CEP, 01310 Sao Paulo, SP Brasil. (6) STRO, ˜lggatan 48 A, Nb, S-216 15 Malmö. 2. 34. Speed symbolí means: 2. 34. 1. An alphabetical symbol indicating the speed at which the tyre can carry the load given by the associated load index. 2. 34. 2. The speed symbol and corresponding speeds are as shown in the table below: Speed symbol Corresponding speed (km/h) L M N P Q R S T U H V 120 130 140 150 160 170 180 190 200 210 240 2. 35. 2. 35. 1. Maximum load ratingí means the maximum mass which the tyre is rated to support. For speeds not exceeding 210 km/h, the maximum load rating shall not exceed the value corresponding to the load index for the tyre. 27. 6. 2000 EN Official Journal of the European Communities C 177 E/51 2. 35. 2. For speeds higher than 210 km/h but not exceeding 240 km/h, (tyres with speed symbol Ví), the maximum load rating shall not exceed the percentage of the value corresponding to the load index of the tyre, indicated in the table below against the speed capability of the vehicle to which the tyre is to be fitted: Maximum Speed (km/h) Load per cent 215 220 225 230 235 240 98,5 97,0 95,5 94,0 92,5 91,0 For intermediate maximum speeds a linear interpolation of the maximum load rating is permissible. Retreading production unití means a site or group of localised sites where finished retread tyres are produced. Retreadingí means the generic term for reconditioning a used tyre by replacing the worn tread with new material. It may also include renovation of the outermost sidewall surface. It covers the following process methods: Top-cappingí - replacement of the tread. Re-cappingí - replacement of the tread and with the new material extending over part of the sidewall. Bead to beadí - replacement of the tread and renovation of the sidewall including all or part of the lower area of the tyre. Casingí is the worn tyre comprising carcass and remaining tread and sidewall material. Buffingí is the process of removing old material from the casing to prepare the surface for the new material Repairí is the remedial work carried out to damaged casings within recognised limits. Tread materialí is material in a condition suitable for replacing the worn tread. It can be in several forms for example: Camel-backí - pre-cut lengths of material which have been extruded to give the required cross section profile and subsequently fitted cold to the prepared casing. The new material must be cured. Strip-woundí - a ribbon of tread material which is directly extruded and wound on to the prepared casing and built up to the required cross sectional contour. The new material must be cured. Direct extrusioní - tread material extruded to give the required cross sectional profile and directly extruded on to the prepared casing. The new material must be cured. Pre-curedí - a previously formed and cured tread applied directly to the prepared casing. The new material must be bonded to the casing. Sidewall veneerí is material used to cover the sidewalls of the casing thereby allowing the required markings to be formed. Cushion gumí is material used as a bonding layer between new tread and casing and for repairing minor damage. Cementí is an adhesive solution to hold new materials in place prior to the curing process. Cureí is the term used to describe the change in physical properties of the new material which is brought about usually by the application of heat and pressure for a set period of time under controlled conditions. Radial run outí means the variation in radius of the tyre measured around the outer circumference of the tread surface. Imbalanceí means a measurement of the variation in distribution of mass around the centre axis of the tyre. It can be measured as either Staticí or Dynamicí imbalance. MARKINGS An example of the arrangement of retreaded tyre markings is shown in annex 3 to this Regulation. Retreaded tyres shall display on both sidewalls in the case of symmetrical tyres and at least on the outer sidewall in the case of asymmetrical tyres: The brand name or trade mark. The tyre-size designation as defined in paragraph 2. 21. 2. 36. 2. 37. 2. 37. 1. 2. 37. 2. 2. 37. 3. 2. 38. 2. 39. 2. 40. 2. 41. 2. 41. 1. 2. 41. 2. 2. 41. 3. 2. 41. 4. 2. 42. 2. 43. 2. 44. 2. 45. 2. 46. 2. 47. 3. 3. 1. 3. 2. 3. 2. 1. 3. 2. 2. C 177 E/52 EN Official Journal of the European Communities 27. 6. 2000 3. 2. 3. An indication of the structure as follows: 3. 2. 3. 1. On diagonal (bias-ply) tyres; no indication, or the letter Dí placed in front of the rim diameter marking. 3. 2. 3. 2. On radial-ply tyres; the letter Rí placed in front of the rim diameter marking and optionally the word RADIALí. 3. 2. 3. 3. On bias belted tyres; the letter Bí placed in front of the rim diameter marking and in addition the words BIAS-BELTEDí. 3. 2. 4. The service description comprising: 3. 2. 4. 1. An indication of the tyre’s nominal load capacity in the form of the load index prescribed in paragraph 2. 33. 3. 2. 4. 2. An indication of the tyre’s nominal speed capability in the form of the symbol prescribed in paragraph 2. 34. 3. 2. 5. 3. 2. 6. 3. 2. 7. The word TUBELESSí if the tyre is designed for use without an inner tube. The inscription M+S or MS or M. S. or M & S in the case of a snow tyre. The date of retreading as follows: 3. 2. 7. 1. Up to 31 December 1999; either as prescribed in paragraph 3. 2. 7. 2. Or in the form of a group of three digits, the first two showing the week number and the third, the year of the decade of manufacture. The date code can cover a period of production from the week indicated by the week number up to and including the week number plus three. For example, the marking 253í could indicate a tyre which was retreaded in weeks 25, 26, 27 or 28 of the year 1953. The date code may be marked on one sidewall only. 3. 2. 7. 2. As from 1 January 2000; in the form of a group of four digits, first two showing the week number and the second two showing the year in which the tyre was retreaded. The date code can cover a period of production from the week indicated by the week number up to and including the week number plus three. For example, the marking 2503í could indicate a tyre which was retreaded in weeks 25, 26, 27 or 28 of the year 2003. The date code may be marked on one sidewall only. 3. 2. 8. The term RETREADí or REMOULDí (after 1 January 1999 only the word RETREADí shall be used). At the request of the retreader, the same term in other languages may also be added. 3. 3. 3. 4. 3. 5. 3. 6. Prior to approval tyres shall exhibit a free space sufficiently large to accommodate an approval mark as referred to in paragraph 5. 8 and as shown in annex 2 to this Regulation. Following approval, the markings referred to in paragraph 5. 8 and as shown in annex 2 to this Regulation shall be affixed in the free space referred to in paragraph 3. 3. This marking may be affixed to one sidewall only. The markings referred to in paragraph 3. 2 and the approval mark prescribed in paragraphs 3. 4 and 5. 8 shall be clearly legible and shall be moulded on to or into the tyre or shall be permanently marked on to the tyre. As far as any of the original manufacturer’s specifications are still legible after the tyres have been retreaded, they shall be regarded as specifications of the retreader for the retreaded tyre. If these original specifications do not apply after retreading they shall be completely removed. The original Eí or áeí approval mark and number shall be removed. 4. APPLICATION FOR APPROVAL The following procedures are applicable to the approval of a tyre retreading production unit. The application for approval of a retreading production unit shall be submitted by the holder of the trade name or trade mark to be applied to the tyre or by his duly accredited, representative. It shall specify: An outline of the structure of the company producing the retreaded tyres. A brief description of the quality management system, which ensures the effective control of the tyre retreading procedures to meet the requirements of this Regulation. The trade names or marks to be applied to the retreaded tyres produced. The following information in relation to the range of tyres to be retreaded: 4. 1. 4. 1. 1. 4. 1. 2. 4. 1. 3. 4. 1. 4. 4. 1. 4. 1. The range of tyre sizes; 4. 1. 4. 2. The structure of tyres (diagonal or bias ply, bias-belted or radial); 4. 1. 4. 3. The category of use of tyres (normal or snow tyres etc. ); 4. 1. 4. 4. The system of retreading and the method of application of the new materials to be used, as defined in paragraphs 2. 37 and 2. 41; 27. 6. 2000 EN Official Journal of the European Communities C 177 E/53 4. 1. 4. 5. The maximum speed symbol of the tyres to be retreaded; 4. 1. 4. 6. The maximum load index of the tyres to be retreaded. 4. 1. 4. 7. The nominated International Tyre Standard to which the range of tyres conform. 5. 5. 1. 5. 2. 5. 3. 5. 4. APPROVAL To retread tyres requires the approval of the retreading production unit by the responsible authorities in accordance with the requirements of this Regulation. The responsible authority takes the necessary measures as described in this Regulation in order to ensure that the tyres retreaded in the respective production unit will meet with the requirements stated in this Regulation. The retread production unit shall be fully responsible for ensuring that the retreaded tyres will meet the requirements of this Regulation and that they will perform adequately in normal use. In addition to the normal requirements for the initial assessment of the tyre retreading production unit, the approval authority shall be satisfied that the procedures, operation, instructions and specification documentation provided by material suppliers are in a language readily understood by the tyre retreading production unit operatives. The approval authority shall ensure that the procedures and operations documentation for each production unit contains specifications, appropriate to the repair materials and processes used, of the limits of repairable damage or penetrations to the tyre carcass, whether such damage is existing or is caused during the processes of preparation for retreading. Before granting approval the authority must be satisfied that retreaded tyres conform to this Regulation and that the tests prescribed in paragraphs 6. 7 and 6. 8 have been successfully carried out on at least 5 and not necessarily more than 20 samples of retreaded tyres representative of the range of tyres produced by the retreading production unit. 5. 5. In the case of each failure being recorded during tests, two further samples of the same specification tyre shall be tested. If either or both of these second two samples fail, then a final submission of two samples shall be tested. If either or both of the final two samples fail, then the application for approval of the retreading production unit shall be rejected. If all the requirements of this Regulation are met, then approval shall be granted and an approval number shall be assigned to each retreading production unit approved. The first two digits of this number shall indicate the series of amendments incorporating the most recent major technical amendments made to the Regulation at the time of issue of the approval. The approval number shall be preceded by XXXRí signifying that the approval applies to a tyre retreaded as prescribed in this Regulation. The same authority shall not assign the same number to another production unit covered by this Regulation. Notice of approval or of extension, refusal or withdrawal of approval or of production definitely discontinued pursuant to this Regulation shall be communicated to the Parties to the 1958 Agreement applying this Regulation, by means of a form conforming to the model in annex 1 to this Regulation. There shall be affixed conspicuously to every retreaded tyre conforming to this Regulation, in the space referred to in paragraph 3. 3 and in addition to the markings prescribed in paragraph 3. 2, an international approval mark consisting of: A circle surrounding the letter Eí followed by the distinguishing number of the country which granted approval (1); and An approval number as described in paragraph 5. 6. Annex 2 to this Regulation gives an example of the arrangements of the approval mark. REQUIREMENTS Tyres shall not be accepted for retreading unless they have been type approved and bear either an Eí or áeí mark, except that this requirement shall not be mandatory until 1 January 2000 at the latest. Tyres which have been previously retreaded shall not be accepted for further retreading. The age of the casing accepted for retreading shall not exceed 7 years, based on the digits showing the year of manufacture of the original tyre; e. g. the tyre marked with a date code 253í can be accepted for retreading till the end of the year 2000. Conditions before retreading: Tyres shall be clean and dry before inspection. 5. 6. 5. 7. 5. 8. 5. 8. 1. 5. 8. 2. 5. 9. 6. 6. 1. 6. 2. 6. 3. 6. 4. 6. 4. 1. ___________ (1) 1 for Germany, 2 for France, 3 for Italy, 4 for the Netherlands, 5 for Sweden, 6 for Belgium, 7 for Hungary, 8 for the Czech Republic, 9 for Spain, 10 for Yugoslavia, 11 for the United Kingdom, 12 for Austria, 13 for Luxembourg, 14 for Switzerland, 15 (vacant), 16 for Norway, 17 for Finland, 18 for Denmark, 19 for Romania, 20 for Poland, 21 for Portugal, 22 for The Russain Federation, 23 for Greece, 24 for Ireland, 25 for Croatia, 26 for Slovenia, 27 for Slovakia, 28 for Belarus, 29 for Estonia, 30 (vacant), 31 for Bosnia and Herzegovina, 32-36 (vacant), 37 for Turkey, 38-39 (vacant), 40 for the former Yugoslav Republic of Macedonia, 41 (vacant), 42 for the European Community (Approvals are granted by its Member States using their respective ECE symbol) and 43 for Japan. Subsequent numbers shall be assigned to other countries in the chronological order in which they ratify or accede to the Agreement Concerning the Adoption of Uniform Technical Prescriptions for Wheeled Vehicles, Equipment and Parts which can be fitted and/or be Used on Wheeled Vehicles and the Conditions for Reciprocal Recognition of Approvals Granted on the Basis of these Prescriptions, and the numbers thus assigned shall be communicated by the Secretary-General of the United Nations to the Contracting Parties to the Agreement. C 177 E/54 EN Official Journal of the European Communities 27. 6. 2000 6. 4. 2. 6. 4. 3. 6. 4. 4. Before buffing, each tyre shall be thoroughly examined both internally and externally to ensure its suitability for retreading. Tyres where damage is visible which has resulted from overload or underinflation shall not be retreaded. Tyres showing any of the following damage shall not be accepted for retreading: 6. 4. 4. 1. (a) extensive cracking extending through to the carcass; (b) carcass penetrations or damage to casings above Hí speed symbol except where these casings are to be down rated to a lower speed symbol; (c) previous repairs to damage outside specified injury limits - see paragraph 5. 3; (d) carcass break up; (e) appreciable oil or chemical attack; (f) multiple damage too close together; (g) damaged or broken bead; (h) non repairable deterioration of or damage to inner liner; (i) bead damage other than minor árubberí only damage; (j) exposed cords due to tread wear or sidewall scuffing; (k) non-repairable tread or sidewall material separation from the carcass; (l) structural damage in the area of the sidewall. 6. 4. 5. 6. 5. 6. 5. 1. 6. 5. 2. 6. 5. 3. 6. 5. 4. 6. 5. 5. 6. 5. 6. 6. 5. 7. Radial ply tyre carcasses with separation in the belt, other than slight belt edge looseness, shall not be accepted for retreading. Preparation: After buffing, and before the application of new material, each tyre shall be thoroughly re-examined at least externally to ensure its continued suitability for retreading. The entire surface to which new material is to be applied shall have been prepared without overheating. The buffed surface texture shall not contain deep buffing lacerations or loose material. Where precured material is to be used the contours of the prepared area shall meet the requirements of the material manufacturer. Loose cord ends are not permissible. Casing cords shall not be damaged during the preparation process. Buffing damage to the belt of radial tyres shall be limited to localised damage to the outermost layer only. Buffing damage limits for diagonal ply tyres shall be as follows: 6. 5. 7. 1. For two ply construction, there shall not be any damage to the carcass except for slight localised buffing damage to the casing joint. 6. 5. 7. 2. For two ply plus breaker construction of tubeless type tyres, there shall not be any damage to the carcass or breaker. 6. 5. 7. 3. For two ply plus breaker construction of tube type tyres, localised damage to the breaker is permissible. 6. 5. 7. 4. For four ply, or more, construction of tubeless type tyres, there shall not be any damage to the carcass or breaker. 6. 5. 7. 5. For four ply, or more, construction of tube type tyres, damage shall be limited to the outermost ply in the crown area only. 6. 5. 8. 6. 6. 6. 6. 1. Exposed steel parts shall be treated as soon as possible with appropriate material as defined by the manufacturer of that appropriate material. Retreading: The retreader must ensure that either the manufacturer or the supplier of repair materials, including patches, is responsible for the following: (a) defining method(s) of application and storage, if requested by the retreader, in the national language of the country in which the materials are to be used; (b) defining limits of damage for which the materials are designed, if requested by the retreader, in the national language of the country in which the materials are to be used; (c) ensuring that reinforced patches for tyres, if correctly applied in carcass repairs, are suitable for the purpose; 27. 6. 2000 EN Official Journal of the European Communities C 177 E/55 (d) ensuring that the patches are capable of withstanding twice the maximum inflation pressure as given by the tyre manufacturer; (e) ensuring the suitability of any other repair materials for the service intended. The retreader shall be responsible for the correct application of the repair material and for ensuring that the repair is free from any defects which may affect the satisfactory service life of the tyre. The retreader shall ensure that either the manufacturer or the supplier of tread and sidewall material issues specifications concerning the conditions of storage and use of the material in order to guarantee the material’s qualities. If requested by the retreader, this information shall be in the national language of the country in which the materials are to be used. The retreader must ensure that the repair material and/or compound is documented in a manufacturer’s or supplier’s certificate. The material compound must be suitable for the intended use of the tyre. The processed tyre shall be cured as soon as possible after the completion of all repairs and building-up operations and at the latest according to the material manufacturer’s specifications. The tyre shall be cured for the length of time and at the temperature and pressure, appropriate to, and specified for, the materials and processing equipment used. The dimensions of the mould shall be appropriate to the thickness of the new material and the size of the buffed casing. Radial ply tyres, when moulded, shall be cured in radial or radially divided moulds only. The thickness of original material after buffing and the average thickness of any new material under the tread pattern after retreading shall be as given in paragraphs 6. 6. 8. 1 and 6. 6. 8. 2. The thickness of material at any point either across the breadth of he tread or around the circumference of the tyre shall be controlled in such a way that the provisions of paragraphs 6. 7. 5 and 6. 7. 6 are met. 6. 6. 2. 6. 6. 3. 6. 6. 4. 6. 6. 5. 6. 6. 6. 6. 6. 7. 6. 6. 8. 6. 6. 8. 1. For radial ply and bias belted tyres (mm) 1. 5 £ (A+B) £ 5 (minimum 1. 5 mm; maximum 5. 0 mm) A ‡ 1 (minimum 1. 0 mm) B ‡ 0. 5 (minimum 0. 5 mm) P. D. = Pattern depth X = Buff line A = Average thickness of new material under pattern B = Minimum thickness of original material above belt after buffing 6. 6. 8. 2. For diagonal (Bias-ply) tyres. The thickness of original material above the breaker shall be ‡ 0. 00 mm. The average thickness of new material above the buffed casing line shall be ‡ 2. 00 mm. C 177 E/56 EN Official Journal of the European Communities 27. 6. 2000 The combined thickness of original and new material beneath the base of the grooves of the tread pattern shall be ‡ 2. 00 and £ 5. 00 mm. The service description of a retreaded tyre shall not show either a higher speed symbol or a higher load index than that of the original, first life, tyre. The minimum speed capability of a retreaded tyre shall be 120 km/h ( Lí speed symbol) and the maximum shall be 240 km/h ( Ví speed symbol). 6. 6. 9. 6. 6. 10. 6. 6. 11. Tread wear indicators shall be incorporated as follows: 6. 6. 11. 1. 6. 6. 11. 2. 6. 6. 11. 3. 6. 6. 11. 4. 6. 7. 6. 7. 1. 6. 7. 2. 6. 7. 3. 6. 7. 4. 6. 7. 5. 6. 7. 6. 6. 7. 7. 6. 8. 6. 8. 1. 6. 8. 2. 6. 8. 3. 7. 7. 1. The retreaded pneumatic tyre shall include not less than six transverse rows of wear indicators, approximately equi-spaced and situated in the principal grooves of the tread. The tread wear indicators shall be such that they cannot be confused with the material ridges between the ribs or blocks of the tread. However, in the case of tyres designed for mounting on rims of a nominal diameter of code 12 or less, four rows of tread wear indicators are permissible. The tread wear indicators shall provide a means of indicating, with a tolerance of + 0. 60/- 0. 00 mm, when the tread grooves are no longer more than 1. 6 mm deep. The height of the tread wear indicators shall be determined by measuring the difference between the depth from the tread surface to the top of the tread wear indicators and the base of the tread grooves, close to the slope at the base of the tread wear indicators. Inspection: After curing, whilst a degree of heat is retained in a tyre, each retreaded tyre shall be examined to ensure that it is free apparent defects. During or after retreading the tyre must inflated to at least 1. 5 bar for examination. Where there is any apparent defect in the profile of the tyre (e. g. blister, depression, etc. ) the tyre shall be specifically examined to determine the cause of this defect. Before, during or after retreading the tyre shall be checked at least once for the integrity of its structure by means of a suitable inspection method. For the purposes of quality control a number of retreaded tyres shall be subjected to destructive and/or non-destructive testing examination. The quantity of tyres checked and the results shall be recorded. After retreading, the dimensions of the retreaded tyre, when measured in accordance with annex 6 to this Regulation, must conform either to dimensions calculated according to the procedures in paragraph 7 or to annex 5 to this Regulation. The radial run out of the retreaded tyre shall not exceed 1. 5 mm (+ 0. 4 mm measuring tolerance). The maximum static imbalance of the retreaded tyre, measured at the rim diameter, shall not exceed 1. 5 per cent of the mass of the tyre. Tread wear indicators shall conform to the requirements of paragraph 6. 6. 11. Performance test: Tyres retreaded to comply with this Regulation shall be capable of meeting the load/speed endurance test as specified in annex 7 to this Regulation. A retreaded tyre which after undergoing the load/speed endurance test does not exhibit any tread separation, ply separation, cord separation, chunking or broken cords shall be deemed to have passed the test. The outer diameter of the tyre, measured six hours after the load/speed endurance test, must not differ by more than – 3. 5 per cent from the outer diameter as measured before the test. SPECIFICATIONS Tyres retreaded to comply with this Regulation shall conform to the following dimensions: 7. 1. 1. Section width: 7. 1. 1. 1. The section width shall be calculated by the following formula: S ê S1 ç K A - A1å where: S: is the actual section width in millimetres as measured on the test rim; S1: is the value of the Design Section Widthí, referred to the measuring rim, as quoted in the International Tyre Standard specified by the retreader for the tyre size in question; A: is the width of the test rim in millimetres; 27. 6. 2000 EN Official Journal of the European Communities C 177 E/57 A1: is the width in millimetres of the measuring rim as quoted in the International Tyre Standard specified by the retreader for the tyre size in question. K: is a factor and shall be taken to equal 0. 4. 7. 1. 2. Outer diameter: 7. 1. 2. 1. The theoretical outer diameter of a retreaded tyre shall be calculated by the following formula: where: D: is the theoretical outer diameter in millimetres; D ê d ç 2H d: is the conventional number defined in paragraph 2. 21. 3, in millimetres; H: is nominal section height in millimetres and is equal to Sn multiplied by 0. 01 Ra where: Sn: is the nominal section width in millimetres; Ra: is the nominal aspect ratio All of the above symbols are as quoted in the tyre size designation as shown on the sidewall of the tyre in conformity with the requirements of paragraph 3. 2. 2 and as defined in paragraph 2. 21. 7. 1. 2. 2. However, for tyres whose designation is given in the first column of the tables in annex 5 to ECE Regulation No 30, the outer diameter shall be that given in those tables. 7. 1. 3. Method of measuring retreaded tyres: 7. 1. 3. 1. The dimensions of retreaded tyres shall be measured in accordance with the procedures given in annex 6 to this Regulation. 7. 1. 4. Section width specifications: 7. 1. 4. 1. The actual overall width may be less than the section width or widths determined in paragraph 7. 1. 7. 1. 4. 2. The actual overall width may also exceed the value or values determined in paragraph 7. 1 by: 7. 1. 4. 2. 1. 4 per cent in the case of radial ply tyres and 7. 1. 4. 2. 2. 6 per cent in the case of diagonal (bias-ply) or bias belted tyres. 7. 1. 4. 2. 3. in addition, if the tyre has a special protective band, the width may be greater by up to 8 mm above the tolerances given by paragraphs 7. 1. 4. 2. 1 and 7. 1. 4. 2. 2. 7. 1. 5. Outer diameter specifications: 7. 1. 5. 1. The actual outer diameter of a retreaded tyre must not be outside the values of Dmin and Dmax obtained by the following formulae: Dmin ê d ç 2H aå Dmax ê d ç 2H bå where: For sizes nor given in the tables in annex 5 to this Regulation, Hí and ádí are as defined in paragraph 7. 1. 2. 1. 7. 1. 5. 1. 2. For sizes mentioned in paragraph 7. 1. 2. 2 above: H ê 0:5 D - då where Dí is the outer diameter and ádí the Nominal rim diameter quoted in the above-mentioned tables for the size in question 7. 1. 5. 1. 3. The coefficient áaí = 0. 97 7. 1. 5. 1. 4. The coefficient ábí is: For normal use tyres 1. 04 1. 04 1. 08 Radial tyres Diagonal (bias-ply) and bias belted tyres C 177 E/58 EN Official Journal of the European Communities 27. 6. 2000 7. 1. 5. 2. For snow tyres the maximum outer diameter (Dmax) calculated in paragraph 7. 1. 5. 1 may be exceeded by not more than 1 per cent. 8. 8. 1. 8. 1. 1. 8. 1. 2. 8. 2. MODIFICATIONS TO THE APPROVAL Every modification concerning a retreading production unit amending any of the information given by the retreading production unit in the Application for Approval, see paragraph 4, shall be notified to the approval authority which approved the retreading production unit. That authority may then either: Consider that the modifications made are unlikely to have an appreciable adverse effect and that in any case the retreading production unit still meets the requirements; or Require a further investigation of the approval. Confirmation of, or refusal of, approval, specifying the modifications, shall be communicated by the procedure specified in paragraph 5. 7 to the Parties to the Agreement which apply this Regulation. 9. CONFORMITY OF PRODUCTION 9. 1. 9. 2. 9. 2. 1. 9. 3. 9. 4. The conformity of production procedures shall comply with those set out in the Agreement, Appendix 2 (E/ECE/t24-E/ECE/TRANS/ 505/Rev. 2), with the following requirements. The retreading production unit approved according to this Regulation shall conform to the requirements set out in paragraph 6. The holder of the approval shall ensure that, during each year of production, and spread throughout that year, at least the following number of tyres, representative of the range being produced. Is checked and tested as prescribed in this Regulation: 0. 01 per cent of the total annual production but in any case not less than 5 and not necessarily more than 20. If the requirements of paragraph 9. 2 are carried out by or under he control of the approval authority, the results may be used as part of, or instead of, those prescribed in paragraph 9. 4. The authority which has approved the retreading production unit may at any time verify the conformity control methods applied in each production facility. For each production facility the type approval authority shall take samples at random during each and every production year and at least the following number of tyres, representative of the range being produced, shall be checked and tested as prescribed in this Regulation: 9. 4. 1. 0. 01 per cent of the total annual production but in any case not less than 5 and not necessarily more than 20. 9. 5. 10. 10. 1. 10. 2. The tests and checks of paragraph 9. 4 may replace those requiredin paragraph 9. 2. PENALTIES FOR NON-CONFORMITY OF PRODUCTION The approval granted in respect of a retreading production unit pursuant to this Regulation may be withdrawn if the requirements of paragraph 9 are not complied with or if the retreading production unit or the retreaded tyres produced by that retreading production unit have failed to meet the requirements prescribed in that paragraph. If a Party to the Agreement which applies this Regulation withdraws an approval it has previously granted, it shall forthwith so notify the other Contracting Parties to the 1958 Agreement applying this Regulation, by means of a communication form conforming to the model shown in annex 1 to this Regulation. 11. PRODUCTION DEFINITELY DISCONTINUED The authority which granted the approval of the retreading production unit shall be informed if operations and manufacture of retreaded tyres approved within the scope of this Regulation cease. On receipt of this information the authority shall communicate this information to the other Parties to the 1958 Agreement applying this Regulation by means of a communication form conforming to the model shown in annex 1 to this Regulation. 12. 12. 1. 12. 2. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR CONDUCTING APPROVAL TESTS, OF TEST LABORA- TORIES, AND OF ADMINISTRATIVE DEPARTMENTS The Parties to the 1958 Agreement which apply this Regulation shall communicate to the United Nations Secretariat the names and addresses of the technical services responsible for conducting approval tests and, where applicable, of the approved test laboratories and of the administrative departments which grant approval and to which forms certifying approval or refusal or withdrawal of approval, issued in other countries, are to be sent. The Parties to the 1958 Agreement which apply this Regulation may use laboratories of tyre manufacturers or retreading production units and may designate, as approved test laboratories, those which are situated either in the territory of that Party or in the territory of another Party to the 1958 Agreement subject to a preliminary acceptance of this procedure by the competent administrative department of the latter. 12. 3. Where a Party to the 1958 Agreement applies paragraph 12. 2, it may, if it desires, be represented at the tests. 27. 6. 2000 EN Official Journal of the European Communities C 177 E/59 ANNEX 1 COMMUNICATION (maximum format: A4 (210 × 297 mm)) issued by: Name of administration:. concerning: (2)-9 APPROVAL GRANTED APPROVAL EXTENDED APPROVAL REFUSED APPROVAL WITHDRAWN PRODUCTION DEFINITELY DISCONTINUED of a retreading production unit pursuant to Regulation No 108. Approval No:. Extension No:. 1. Retreader’s name or trade mark:. 2. Name and address of retreading production unit:. 3. If applicable, name and address of retreader’s representative:. 4. Summarised description as in paragraphs 4. 1. 3 and 4. 1. 4 of this Regulation:. 5. Technical service and, where applicable, test laboratory approved for purposes of approval or verification of conformity:. 6. Date of report issued by that service:. 7. Number of report issued by that service:. 8. Reason(s) of extension (if applicable):. 9. Any remarks:. 10. Place:. 11. Date:. 12. Signature. 13. Annexed to this communication is a list of documents in the approval file deposited at the Approval Authority which has considered this approval and which can be obtained upon request. (1) Distinguishing number of the country which has granted/extended/refused/withdrawn an approval (2) Delete that which does not apply. (see approval provisions in the Regulation). C 177 E/60 EN Official Journal of the European Communities 27. 6. 2000 ANNEX 2 ARRANGEMENT OF APPROVAL MARK a = 12 mm (minimum) The above approval mark affixed to a retreaded tyre shows that the retreading production unit concerned has been approved in the Netherlands (E4) under approval number XXXR002439 meeting the requirements of this Regulation in its original form (00). The approval number must be placed close to the circle and either above or below the Eí or left or right of that letter. The digits of the approval number must be on the same side of the Eí and face in the same direction. The use of Roman numerals as approval numbers should be avoided so as to prevent any confusion with other symbols. 27. 6. 2000 EN Official Journal of the European Communities C 177 E/61 ANNEX 3 ARRANGEMENT OF RETREAD TYRE MARKINGS Example of the markings to be borne by retreaded tyres placed on the market after the entry into force of this Regulation b: 6 mm (min. ) c: 4 mm (min. ) d: 3 mm (min. ) and from 1998, 4 mm (min. ) These markings define a retreaded tyre: having a nominal section width of 185; having a nominal aspect ratio of 70; of radial-ply structure (R); having a nominal rim diameter of code 14; having a service description 89Tí indicating a load capacity of 580 kg corresponding to a load index of 89í and a maximum speed capability of 190 km/n corresponding to a speed symbol Tí; for fitting without an inner tube ( TUBELESSí); of snow type (M+S); retreaded in the weeks 25, 26, 27 or 28 of the year 2003; The positioning and order of the markings constituting the tyre designation shall be as fallows: (a) the size designation, comprising the nominal section width, the nominal aspect ratio, the type-of-structure symbol (where applicable) and the nominal rim diameter shall be grouped as shown in the above example: 185/70R14; (b) the service description comprising the load index and the speed symbol shall be placed near the size designation. It may either precede the size designation or follow it or be placed above or below it; (c) the symbols TUBELESSí, REINFORCEDí, and M+Sí may be at a distance from the size designation. (d) the word RETREADí may be at a distance from the size designation. C 177 E/62 EN Official Journal of the European Communities 27. 6. 2000 ANNEX 4 LIST OF LOAD INDICES AND CORRESPONDING LOAD CAPACITIES Load index (LI) and load capacity - kg kg 140 145 150 155 160 165 170 175 180 185 190 195 200 206 212 218 224 230 236 243 250 257 265 272 280 290 300 307 315 325 335 345 355 365 375 387 400 412 425 437 LI 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 kg 450 462 475 487 500 515 530 545 560 580 600 615 630 650 670 690 710 730 750 775 800 825 850 875 900 925 950 975 1 000 1 030 1 060 1 090 1 120 1 150 1 180 1 215 1 250 1 285 1 320 1 360 LI 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 kg 1 400 1 450 1 500 1 550 1 600 1 650 1 700 1 750 1 800 1 850 1 900 1 950 2 000 2 060 2 120 2 180 2 240 2 300 2 360 2 430 2 500 2 575 2 650 2 725 2 800 2 900 3 000 3 075 3 150 3 250 3 350 3 450 3 550 3 650 3 750 3 875 4 000 4 125 4 250 4 375 LI 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 kg 4 500 4 625 4 750 4 875 5 000 5 150 5 300 5 450 5 600 5 800 6 000 6 150 6 300 6 500 6 700 6 900 7 100 7 300 7 500 7 750 8 000 8 250 8 500 8 750 9 000 9 250 9 500 9 750 10 000 10 300 10 600 10 900 11 200 11 500 11 800 12 150 12 500 12 850 13 200 13 600 LI 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 kg 14 000 14 500 15 000 15 500 16 000 16 500 17 000 17 500 18 000 18 500 19 000 19 500 20 000 20 600 21 200 21 800 22 400 23 000 23 600 24 300 25 000 25 750 26 500 27 250 28 000 29 000 30 000 30 750 31 500 32 500 33 500 34 500 35 500 36 500 37 500 38 750 40 000 41 250 42 500 43 750 LI 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 kg 45 000 46 250 47 500 48 750 50 000 51 500 53 000 54 500 56 000 58 000 60 000 61 500 63 000 65 000 67 000 69 000 71 000 73 000 75 000 77 500 80 000 82 500 85 000 87 500 90 000 92 500 95 000 97 500 100 000 103 000 106 000 109 000 112 000 115 000 118 000 121 500 125 000 128 500 132 000 136 000 LI. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 kg 45 46. 2 47. 5 48. 7 50 51. 5 53 54. 5 56 58 60 61. 5 63 65 67 69 71 73 75 77. 5 80 82. 5 85 87. 5 90 92. 5 95 97. 5 100 103 106 109 112 115 118 121 125 128 132 136 LI 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 27. 6. 2000 EN Official Journal of the European Communities C 177 E/63 TYRE SIZE DESIGNATION AND DIMENSIONS (IN ACCORDANCE WITH ECE REGULATION No 30) ANNEX 5 For this information refer to annex 5 of ECE Regulation No 30. ANNEX 6 METHOD OF MEASURING PNEUMATIC TYRES 1. Preparing the tyre 1. 1. The tyre shall be mounted on the test rim specified by the retreader and inflated to the pressure of 3 to 3. 5 bar. 1. 2. The tyre pressure shall be adjusted as follows: 1. 2. 1. for standard bias belted tyres - to 1. 7 bar; 1. 2. 2. for diagonal (bias ply) tyres - to: Pressure (bar) for Speed symbol Ply rating L, M, N P, Q, R, S T, U, H, V 4 6 8 1. 7 2. 1 2. 5 2. 0 2. 4 2. 8 - 2. 6 3. 0 1. 2. 3. for standard radial tyres - to 1. 8 bar; 1. 2. 4. for reinforced tyres - to 2. 3 bar. 2. Measuring procedure 2. 1. The tyre, mounted on its rim, shall be conditioned at the ambient room temperature for not less than 24 hr, save as otherwise required by paragraph 6. 8. 3 of this Regulation. 2. 2. The tyre pressure shall be readjusted to the level specified in paragraph 1. 2 of this annex. 2. 3. The overall width shall be measured at six equally spaced points around the tyre, taking account of the thickness of any protective ribs or bands. The highest reading obtained shall be taken as the overall width. 2. 4. The outer diameter shall be calculated from a measurement of the maximum circumference of the inflated tyre. C 177 E/64 EN Official Journal of the European Communities 27. 6. 2000 ANNEX 7 PROCEDURE FOR LOAD/SPEED ENDURANCE TESTS (In principle in accordance with annex 7 of Regulation No 30) 1. Preparing the tyre 1. 1. Mount a retreaded tyre on the test rim specified by the retreader. 1. 2. Inflate the tyre, to the appropriate pressure as given (in bar) in the table below: Speed Category Diagonal (bias-ply) tyres Radial Tyres Bias-belted tyres Ply-rating Standard Reinforced Standard L, M, N P, Q, R, S T, U, H V 4 2. 3 2. 6 2. 8 3. 0 6 2. 7 3. 0 3. 2 3. 4 8 3. 0 3. 3 3. 5 3. 7 2. 4 2. 6 2. 8 3. 0 - 3. 0 3. 2 3. 4 - 2. 6 2. 8 - 1. 3. The retreading production unit may request, giving reasons, the use of a test inflation pressure different from those given in paragraph 1. 2 of this annex. In this case the tyre shall be inflated to the requested pressure. 1. 4. Condition the tyre and wheel assembly at test-room temperature for not less than three hours. 1. 5. Readjust the tyre pressure to that specified in paragraph 1. 2 or 1. 3 of this annex. 2. Test procedure 2. 1. Mount the tyre and wheel assembly on a test axle and press it against the outer face of a smooth surfaced power driven test drum either 1. 70 m – 1 per cent or 2. 00 m – 1 per cent diameter 2. 2. Apply to the test axle a load equal to 80 per cent of: 2. 2. 1. the maximum load rating corresponding to the Load Index for tyres with Speed Symbols L to H inclusive, 2. 2. 2. the maximum load rating associated with a maximum speed of 240 km/h for tyres of Speed Symbol Regulation). Ví (see paragraph 2. 32 of this 2. 3. Throughout the test the tyre pressure must not be corrected and the test load must be kept constant. 2. 4. During the test the temperature in the test-room must be maintained at between 20° and 30 °C unless the tyre manufacturer or retreader agrees to a higher temperature. 2. 5. The endurance test programme shall be carried out without interruption and shall be as follows: 2. 5. 1. time taken from zero speed to initial test speed: 10 minutes; 2. 5. 2. initial test speed: prescribed maximum speed for the tyre concerned, less 40 km/h in the case of a test drum of 1. 70 m – 1 per cent diameter or less 30 km/h in the case of a test drum of 2. 00 m – 1 percent diameter; 2. 5. 3. successive speed increments: 10 km/h up to the maximum test speed; 2. 5. 4. duration of test at each speed step except the last: 10 minutes; 2. 5. 5. duration of test at last speed step: 20 minutes; 2. 5. 6. maximum test speed: prescribed maximum speed for the tyre concerned, less 10 km/h in the case of a test drum of 1. 70 m – 1 per cent diameter or the prescribed maximum speed in the case of a test drum of 2. 00 m – 1 per cent diameter. 3. Equivalent test methods If a method other than that described in paragraph 2 of this annex is used, its equivalence must be demonstrated. 27. 6. 2000 EN Official Journal of the European Communities C 177 E/65 ANNEX 8 EXPLANATORY FIGURE See paragraph 2 of this Regulation