Features Fastest race wheel on gravel, 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 Max tire pressure 50 psi/3.45 bar ZR1 DB hub is engineered in Germany with better seal design for improved durability and quicker response with 66 points of engagement Center locking rotor interface. Lockring is included with the wheels. XDR or SRAM/Shimano driver bodies Campagnolo N3W Driver body sold separately Ships with 12mm front and rear end caps Lifetime Warranty *303 XPLR SW IS ONLY COMPATIBLE WITH APPROVED TIRES. The Goodyear XPLR Slick and Goodyear XPLR Inter are specifically designed and optimized for the 303 XPLR SW. 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, Impress valve graphic, Adhesive decals Hub: ZR1 Disc Brake Driver body type: SRAM XDR, SRAM/Shimano Road, n/a Bearings: Cartridge - Carbon 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): 1452 Weight Based On: Estimated lightest weight for wheelset configuration: 12mm through axles and XDR body. Tape and valve included in weight.