Vuka Clip Carbon A1Zipps Vuka Clip with Carbon Race Extensions provides a highly adjustable system allowing you to dial in your aero tuck, and stay there. The Vuka Race Carbon Extension was designed using data compiled from thousands of fit sessions with recreational and professional cyclists and triathletes by the worlds best fitters. The Vuka Race bend places the wrists at a more natural bend to help riders remain in their tuck to optimize aerodynamics. Vuka Clip