Zipp 303 S Rear Wheel - 700, 12 x 142mm, Center-Lock, XDR, Tubeless, Black, A1. Rear Axle 12mm Thru x 142mm. The 303 S borrows design concepts from the higher-level 303 Firecrest Tubeless wheels to gain speed through increased efficiency, achieved by creating a wheel with reduced wind resistance, rolling resistance, rider fatigue, and weight.
eBay