Want free speed? Take a look at where your bike meets the road. Bontrager's Race X Lite Aero TT features a silica/carbon tread combination that rolls effortlessly yet sticks like glue in the corners. The 120tpi casing is lightweight with supple ride characteristics and features an integrated breaker ply for added puncture protection. Plus, the clincher Aero TT uses a unique aero wing design for improved airflow over the tire-rim interface to slice through the wind unnoticed.