What Our Gearhead® Experts Are Saying: “The 303 S hits that perfect sweet spot—it’s light, fast, and surprisingly capable on rough pavement or gravel. I’ve been running 32mm tubeless tires, and the comfort and grip are incredible without sacrificing speed.” From race-day tarmac to rolling gravel roads, the Zipp 303 S Carbon Disc Brake Wheel brings next-level efficiency and versatility to every ride. Designed around Zipp’s new-generation hookless rim profile, it optimizes aerodynamics, lowers rolling resistance, and allows for wider tires that transform ride comfort without slowing you down. The 23mm internal width supports modern tire sizes—up to 50mm—so you can run lower pressures for improved traction and reduced fatigue on rough terrain. At just 1,530 grams for the set, the 303 S delivers the rapid acceleration and precise handling that make every climb, descent, and corner feel smoother and faster. Paired with the 76/176 DB hubs and Sapim CX-Sprint spokes, it’s a wheelset built for real-world speed, not just wind-tunnel numbers.