The M5 Pro marks a new era in M Series cross-country wheels, raising the bar for speed, efficiency, and toughness. It is the result of a more than 4-year development project during which ENVE worked closely with its professional athletes to create something that would give the fastest endurance athletes an edge. Unique front and rear rim construction combined with an all-new shallow rim shape offer an unmatched blend of characteristics, designed to go far and fast. - The rear rim is firmer, to maximize power transmission and impact toughness - Wide Hookless Bead - XC optimized anti-pinch flat protection - Innerdrive 80pt engagement hubs with CX Ray straight pull spokes - Alloy external nipples with Nyloc thread-locking - Built for cross-country race applications - Backed by ENVE's 5-year Factory Warranty and Incidental Damage Protection