The Zipp Vuka Clip with Alumina Race Extensions offers a perfectly adjustable system that allows you to assume and maintain your aero position. The Vuka Alumina Race Extensions feature a rise of 52 mm. The "Race" was developed using data gathered from thousands of bike fitting sessions with recreational riders, professional cyclists, and elite triathletes. The Vuka Race bend positions the wrists in a more natural curve, enabling riders to stay in their position and optimize aerodynamics. The Vuka Clip provides greater adjustment of the armrest spacing, including even tighter positions. Wedge inserts can tilt the armrests upward. -5° wedge, -10° wedge, and -15° wedge can be stacked with the 5° and 10° wedges. The 31.8 mm clamp of the Vuka Clip is compatible with the Zipp Vuka Alumina base handlebar and the Vuka Bull, as well as all other road, time trial, or triathlon handlebars suitable for clip-ons.