Cycling is pretty heavily biased toward light people. Typical ~6' 3" pro riders (which are far from being typicall human beings) are around 180 lb. For example, phenom Taylor Phinney is 6' 4" and 180, and George Hincapie is 6' 3" and 170. Riders over 200 lb are affectionately and respectfully referred to as Clydesdales (Athenas for women). There is a Bike Forum here to discuss the issues of heavy weight participants in a sport geared toward lightweight riders.

http://www.bikeforums.net/forumdispl...00-lb-91-kg%29