Supercaliber 9.9 is the fastest, lightest, and most capable cross country race bike we make-and that's exactly why it's Trek Factory Racing's World Cup bike of choice. The exclusive IsoStrut top tube shock is the cornerstone of Supercaliber's efficient suspension system, giving you a fast and light ride that charges through rugged terrain at breakneck speed. The high-end mountain bike parts spec comes dripping with carbon, and includes the highest-performance drivetrain, brakes, and wheels you can get.