If I have a stock Trek Pilot 5.2, and I am going to replace the back wheel with the recommendations in my post with velocity deepv wheels and the spokes he told me about. But here is my question. When I replace the back wheel, would I get any difference in getting a red cassette instead of the ultregra it has on it? Somehow, the cassette from red makes sense to me since it is machined from one piece, seems like it would be better for some reasons, is this true? and would the red cassette be usable with the ultegra crank, its a triple on the trek pilot 5.2. and the chain would my ultegra chain work with is, and would I be able to change out the cassette myself? is it easy? Any info will help, thanks.