Haha damn Iphone!! Looked like a little motor on a 3" screen. Badass bikes though!!:cheers:The black one is a Brooklyn Machine Works Race Link. Its a GREAT bike and has taken the WORST abuse you could ever think of. No motor just pedals :bigthumb: There is a chain on the left side which drives a chain on the right side, which goes to the wheel. It is designed like that to help eliminate pedal bob.