Bontrager's Race X Lite Crankset has gorgeous carbon crankarms paired with a rugged TruVativ Giga X-Pipe bottom bracket to lighten your ride and provide a flex-free pedaling experience that translates every ounce of energy into forward motion. Its 53/39 gearing is race-ready while the hard-plated 7075-T6 aluminum chain rings deliver crisp, easy shifting and excellent durability.