Getting some new ProII's built up but not sure which rims to use. 15 stone, enjoy riding trail centres on my full susser. Any recommendations?
Thought about one of the 21mm Mavic rims, but whats the difference between the EN, XM and EX? Also, I know the last two digits stand for the internal width of the rim, but whats the 3, 5 and 7 signify?