Originally Posted by roshea

I've said it before, and I'll say it again:

The data in the graph is from this test - rim depth versus power absorbed at 50 km/h (lower is better!).



Basically, it's not linear and it's not simple. Rim depth is only part of the equation - the shape of the rim and the number and shape of spokes also matter. A "good" wheel with a 20 mm rim can do better than a "bad" 45 mm rim, but that sort of outcome is rare. Things start to improve at 30 mm and are considerably better over 50 mm.