I just purchased this bike on craigslist for $100 with the motor attached. It has an older Swchinn front wheel but missing the rear wheel. I bought the bike from a woman who was a landlord and her tanant couldn't pay rent. So he left the bike incomplete but with a working motor. I'm not sure what size it is, but it does work (I installed it on another bike and took it for a spin). I'm going to rebuild the bike and see what I can do to it. The wife already climed it and wants it done acertain way. So she's doing all the ordering and I'm doing the building. The bike is a Greenline Army Camo Bike and is in fairly good shape except for a little rust and the original builder drilled throught he frame to mount the motor. But that will be changed.