Features Fast and robust gravel wheel, features tubeless and hookless rim profile Ultra-wide internal profile for decreased rolling resistance, ability to run pressures under 30psi (2.1 bars) Wide and deep profile integrates seamlessly with gravel tires to increase aerodynamic efficiency Applies Zipp’s Total System Efficiency to high-performance gravel 76 / 176 DB hubs with Center locking interface XDR or SRAM/Shimano driver bodies Ships with 12mm front and rear end caps Max tire pressure 50 psi/3.45 bar Lifetime Warranty *303 XPLR S IS ONLY COMPATIBLE WITH APPROVED TIRES. The Goodyear XPLR Slick and Goodyear XPLR Inter are specifically designed and optimized for the 303 XPLR S. Specifications Size (wheels): 700c Rim construction: Carbon – Hookless Tire compatibility: Approved TLR tires (40c-60c) w/ tube or sealant Rim depth: 54mm Brake compatibility: Disc (Center Lock) Rim - inside width: 32mm Rim profile: Symmetrical Rim finish: UD fiber, adhesive decals Hub: 176D, 76D Driver body type: SRAM XDR, SRAM/Shimano Road, n/a Bearings: Cartridge - Stainless Steel Max tire pressure: 50psi/3.45bar Max recommended system weight: 298lbs/135kg Spoke Length DS: n/a Spoke Length NDS: n/a Max outside width: 40mm Weight (g): 1610 Weight Based On: Estimated lightest weight for wheelset configuration: 12mm through axles and XDR body. Tape and valve included in weight.