Bontrager's Race Lite Aero Bullhorn is light, strong, ergonomic and a great upgrade for your wind-cheating machine. This UCI-legal base bar is compatible with Bontrager clip-ons and aero brake levers, and it uses internal cable routing for a slippery, low-drag profile. And, it boasts a 31.8mm clamp diameter for stiffness that kicks in every time you accelerate.