Designed for training, all-around, mountains, sprints, time trials, triathlons 58mm deep, 22.5mm wide torodial profile Zipp alloy clincher wheels feature M2CM seamless technology that fuses the sub-200g alloy rim to the carbon rims Aerodynamic Boundary Layer Control (dimpled surface ) tames airflow at more wind angles than smooth rims Updated 188 hubs feature canted flanges to decrease stress on spokes and a wider bearing stance for increased stiffness and durability Hubs feature the same 17mm alloy axle, aerodynamic axle end-caps, and bearing preload adjustment as the 2009-11 generation hubs Wheels are built by hand in Indianapolis, Indiana Includes black aero stainless skewersWheel Size: 700c Rim: Zipp 505 Rim Color: Black Defined Color: Black Hub/Brake Compatibility: Rim Brake Tire Type: Clincher Cassette Body Type: Shimano 9/10/SRAM Rear Hub Spacing: 130 mm Hub Color: Black Rear Axle Type: 10×1 Skewer Included: Yes Hub Drilling: 20 Spoke Info: Sapim CX Ray Spoke Color: Black ISO Diameter: 622 / road / 29″ Rim Depth: 58 mm Rear Wheel Internal Rim Width: Rim Material: Carbon Valve: Presta Valve Length: Long 56-74mm Rear Wheel Type: Road Weight: 886.0 g.