The ZIPP 303 S Tubeless Carbon Rear Wheel combines speed and efficiency with all-road versatility. Sharing its design with ZIPP’s Firecrest models, the 303 S is built to handle the Spring Classics and imperfect surfaces in all conditions, maintaining its performance. It features a wider rim profile than its predecessor, enhancing capability over varied terrain and reducing drag for lower rolling resistance. SKU: 00.1918.528.001