Absolutely the worst bag for rough surfaces like concrete sidewalks or cobblestones. DO NOT BUY if you are going to travel where the sidewalks are anything but very smooth, like airport concourses. The bag is a great bag, light, roomy, easy to pack in, and the bag itself is very well made.  BUT -- can be used ONLY on smooth surfaces such as terrazzo floors, where it rolls perfectly.  Not so great on carpets, but ok.  On a trip to and from Washington DC, I left my vehicle at Sheraton Arlington, and dragged the bag across more than a mile of concrete sidewalk to the Pentagon Metro Station.  Upon my return a month later, after dragging the bag to and from Penn Station in NYC, about five blocks to my hotel, I then dragged the bag back from the Pentagon Metro Station to the Sheraton.  Total travel on concrete sidewalks about 3 miles.  Shredded the wheels, completely ruining them.  For the great price of about $80, Travel Pro graciously sold me a set of replacement wheels -- half the price of a new bag.  I used the bag one more time, train from Little Rock to Chicago, dragged the bag three blocks from the main train station to the nearest subway station,  then a couple days later CARRIED the bag from the Helsinki train station to my hotel three blocks away -- impossible to use this bag on the cobblestone streets.  Then from my hotel back to the train station, a flight to Moscow Sheremetyevo Airport; fortunately no concrete sidewalks except to get to the car.  Bottom line?  The wheels on the bag are not suitable for travel in Europe or anywhere with concrete or cobble or brick sidewalks.  My suggestion?? I bought a soft side duffel bag from IKEA for $50, and it has large silicone wheels that thus far have put up with the punishment of cobble sidewalks in Helsinki, Prague, Nice; the sidewalks of D.C.,  San Francisco, and Las Vegas, and many other places.  Sadly, IKEA no longer has that bag, but there are others on the market that are very suitable for rough surfaces.  What do I do with the bag?  It stores my winter clothes in my storage room.