Zipp Vuka Aerobar Extensions - Evo 70, Aluminum, High Bike Accessories Brand_Specialized the Oversized Pulley Wheel (OSPW)

the Oversized Pulley Wheel (OSPW) System for Shimano 9000/6700 provides the ultimate optimization of your bicycle's drivetrain

This helps you gauge your effort and see how much you have left to suffer

18mm hole spacing

stretch resistant synthetic leather and mesh

Zipp Vuka Aerobar Extensions - Evo 70, Aluminum, High Bike Accessories Brand_Specialized the Oversized Pulley Wheel (OSPW)The Vuka Clip On is all about providing the ultimate in fit, security, and adjustability for you to be faster and more efficient in your triathlon or time trial aero position. Offered in affordable aluminum or high performance carbon fiber, in both above and below bar configurations. Additional risers, armrests and aero accessories available for fine tuning and maintenance.