...this happening/how to fix? I jut retrieved by bike from the bike rack and when I went to ride it, it was like I could pedal but the bike would not move, it only moved from the momentum I used to push off. I don't know anything about bikes, so to me, it looks like nothing is wrong with the chain and everything. But I have no idea. Why would this be happening? And how could i fix it - preferably without having to go to the bike repair store?? Please help! Thanks SO much!