Zipp Vuka Aerobar Extensions - Race Carbon High CheckoutSpec= 6.3''x11.8'' Threaded part is designed to

Threaded part is designed to work on the drive-side crank only (9/16" x 20 tpi thread)

Steerer Type TaperedLockout Switch CrownBrake Type Post Mount 160Negative Spring AirTravel (mm) 30Offset 51Axle to Crown Length 425Front Axle 12mm Thru x 100mmMaximum Tire Width 50S

Measure your running efficiency with insights like stride length long-term volume and step speed loss showing how much you slow down on impact

Tread design engineered to deliver unparalleled speed and control on the trails

Race 3 is the least resistance/highest airflow

Zipp Vuka Aerobar Extensions - Race Carbon High CheckoutSpec= 6.3''x11.8'' Threaded part is designed toZipp Vuka Aerobar Extensions Race Carbon High. 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. TECH SPECS Color Black Material