Originally Posted by
cradduck
How do I adjust the seat relative to the bottom bracket? It wasn't even the right height when I rode it home from the bike shop. The BB on this bike is in a much more forward position to the BB on my old road bike which the BB was only slightly forward of the seat position.
To raise/lower the seat, loosen the seatpost binder bolt at the top of the seat tube and slide the seatpost.
http://sheldonbrown.com/saddles.html#adjustment
Generally speaking, you want the position of the seat relative to the bottom bracket to be pretty much the same on all your bikes. You'll have to compensate for varied crank length though (e.g. for longer cranks, the seat should be lower--so you don't hyperextend at the bottom of the stroke--and further forward--so your knee and pedal line up at the front of the stroke).
Fore/aft position can be tweaked to riding style (e.g. MTBers sometimes like the seat back a little further).