They got the name of Grand Tour because they are some of the oldest, hardest and longest stage races in the calendar.
ð eɪ WORD_BOUNDARY ɡ ɑ t WORD_BOUNDARY ð ə WORD_BOUNDARY n eɪ m WORD_BOUNDARY ʌ v WORD_BOUNDARY ɡ ɹ æ n d WORD_BOUNDARY t ʊ ɹ WORD_BOUNDARY b ɪ k ʌ z WORD_BOUNDARY ð eɪ WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY s ʌ m WORD_BOUNDARY ʌ v ð ɪ WORD_BOUNDARY oʊ l d ɪ s t WORD_BOUNDARY h ɑ ɹ d ɪ s t WORD_BOUNDARY æ n d WORD_BOUNDARY l ɔ ŋ ɡ ɪ s t WORD_BOUNDARY s t eɪ d̠ʒ WORD_BOUNDARY ɹ eɪ s ɪ z WORD_BOUNDARY ɪ n ð ə WORD_BOUNDARY k æ l ə n d ə ɹ WORD_BOUNDARY