I have 2 xGerman COMFORT folding bike about 4 weeks before bought so my wife and I are a little more flexible, and can go on all bike in a few steps. Amazon's site was as always everything very quickly and super. From as true the wheels there, and I wanted to assemble them, one was bent at the middle folding mechanism, and read not open itself. So back to the part. The second wheel was perfectly fine. As the broken wheel was exchanged, we were able to drive well then first. In the second bike, then jumped to the always already exchanged the wheel third gear to the fourth, and quite often the fourth then fifth gear. Since I was immediately angry. This is me then at my home in a Fahrradwerkstat and had it set up. It true only a few simple steps, and it was all i. O. Now I hope that it stays that way. For driving with the folding bikes I can sarging anything negative. For our needs, the wheels are top. And if nothing more happens, we are fully satisfied.