... races. For riders above 160 lbs a 50-60 mm deep rim is a good all round option. ... 35-45 mm range.3 About building-mechanical calculations.A superb wheel needs superb rims, hubs, spokes, ... and nipples. Also it requires a good mechanic calculations on the accurate spoke lengths, ... temperature basalt resin. when riding, especially for a long time downhill riding, the wheels generate lots ...