Performance 7kg vs 15 kg bike same type

[madcyclist]

(03-16-2010, 07:26 AM)Joe_W Wrote:  Once you have reached the speed, the only energy needed is to overcome .....

Interesting and complicated but looks you know things better. yes air pressure i s important. aerodynamics come into play when speed is 27km i know. but not sure how extra weight affects the rides.
I was just curious though. an extra 7 kg on back for instance will only reduce 1 min in 24 km/ride per hour is hard to digest though.

Thanks for the response