BONTRAGER RXL AERO CLIP BAR CARBON Optimized in the wind tunnel, Bontrager's Race X Lite Carbon Clip-On Aerobars use a unique clamping mechanism that mounts securely but is gentle on carbon fiber and lightweight aluminum bars. Constructed from high compression molded carbon and lightweight, forged aluminum, the X Lite Aerobar features aerodynamic internal cable routing and fits oversized 31.8mm handlebars. Features OCLV Carbon Fiber extensions and forged alloy clampsCarbon friendly clamps fit 31.8mm diameter base barsSpeed Concept Ergo extension shape with internal cable routingSpeed Concept arm pads with a low pad height of 43mmLaser-etched extension markings for quick and easy setup