The Zipp 404 S offers the ideal balance of weight, aerodynamics, and aesthetics to the discerning cyclist. Fit for road racers, criterium specialists, or any high-performance pavement rider. At 50mm deep, the 404 S rim’s mid-depth profile provides premium level aerodynamic performance while staying shallow enough to maintain stability in crosswinds. Paired with a 23mm internal rim width, this TSS wheel allows for 28-40 mm width tires to be run at lower pressures for optimal rolling resistance and control on nearly any road condition.