Originally Posted by
HTupolev
If you add a pound to your rims, and you pedal at 200W, it'll take you in the rough neighborhood of 30 seconds longer to ascend Alpe d'Huez, or a quarter second longer to accelerate from 0 to 25mph.
I'm more worried about start and stop. Accelerating from a stop is a lot more fun with light tires. But, if you are just going out for a cruise without stops, weight doesn't make much of a difference.
Heck, on the velodrome we use some pretty heavy wheels for longer time trials (or the 1 hour record) because when you don't stop, the aero makes a bigger difference than weight at those speeds. I'm not using those heavy wheels for sprints though! LOL.