I appologize in advance if my terminology is flawed... I'm interested in exploring how to produce power with a bicycle and have read a ton about it on the internet so far. However, I can't seem to find anyone running more than one motor from a single bike. I assume there's a good reason but can't find the asnwer anywhere. All of the systems I have seen have a single motor hooked up to a bicycle's rear tire by friction or directly to the crankset through a belt or chain. My question is, if you had the rear tire or the crankset hooked up to an axle (through friction or chain/belt) that had more than one motor hooked up to it, what would happen to the power you generate on the bike (lets say 100W)? I guess I'm really asking if it's possible to generate the same amount of power PER MOTOR (100W for 2 motors) or if the power you generate is split among the motors (50W to each)and if so, why? I understand there will be losses in efficiency (and power) by making the system more complex but don't where to start with quantifying. Thanks for any help!