I currently ride my car to university, and for my work ( drive for a living 3 hrs a week ). Im thinking on nice days I can get away with biking most of this distance myself, but not at a high speed and I got a fair ways to go (12 km each way for school). I want to be able to get a system that has NO drag when not in use though. I know brushless motors are better than brushed from my r/c cars even for drag, but I have searched and read here that there is still resistance. I havent bought a bike yet either, so is WEIGHT or lower center of gravity to reduce air drag more important? Any bike ideas? I would very greatly appreciate any advice. Normally id have no problem doing this without e assist but ive been sick the last year and my cardio suffered big time and I still having a hard time getting it back.