There are carbon rims and then there are ENVE carbon rims, and the ENVE M730 27.5 Carbon Rim is in a class of its own. 32 spoke holes and unidirectional carbon fiber create a rim that's strong enough for big and fast descents but light enough for the climb. A protective plastic rim strip creates a buffer between your rim and the tire, eliminating pinch flats and tragic rim damage so you can lower your pressure to your heart's content in the rowdiest terrain.