The Trek Procaliber is a game-changing cross-country race machine that pairs classic hardtail efficiency with capable geometry for a ride that’s chomping at the bit to attack off the starting line and sprint up climbs. From short track to ultra-endurance, for the World Cuppers and the first timers, the Trek Procaliber is a XC mountain bike built to deliver the speed and power you need to stay at the front of the pack.