question about slack in chain/"play" in cranks
hi, just got my bike finished up last night (old schwinn road frame and various junkbin parts), and went on the "maiden voyage" this morning on the way to work. lots of fun. i dig the simplicity and lightness of my new bike (beats commuting on a big ol mountain bike). but i noticed one thing:
there's a little bit of "play" in the cranks. by this i mean that if you push up and down on the pedal, or forwards and backwards, you can move the crankandpedal a little bit w/o moving the wheel. it's just a little bit. it's like there's a little bit of slack going from forwards to backwards. just a little. is this just because there's a little slack in the chain?
and i'm no physicist or anything, but couldn't the slack create more of a force on the rear wheel and cog than if it was perfectly smooooth(is perfectly smooth even possible?). is this bad?
sorry for all the probably assinine questions.