Originally Posted by
urbanknight
The amount of energy it takes to spin ~4lb pair of wheels up to 300 rpm is negligible as it is (take a wheel's axles between your thumbs and index fingers and give it a good flick with your middle finger to see what I'm talking about), and you're talking about feeling the difference of spinning 4lb versus 3.6lb. I'm not saying you can't do it, but it makes me want to place a pea under your mattress.
Well, I did revise my comment to make it more like 4 lbs. vs. 3.1 lbs. Perhaps it's a combination of lower rolling resistance tires and the weight but the bike feels livelier with the lighter wheelset. Notice I'm not claiming average speed gains (I know we all love them) or better time trial times (or commute times in my case).
How much weight do you need to add/remove before you can feel a difference, out of curiosity?