Originally Posted by cachehiker
+1.
If you lose 100g of rim weight, another 100g of tire weight, 30g of spokes, and 30g of tube, you'll probably pick up almost 2 mph. The weight of the rest of the bike makes much less of a difference.
Does the weight of the wheels make a big difference once you're underway? I can see how it would affect accelerating and braking, but once you're at steady speed, is the spinning weight any different than weight on the rest of the bike?