- 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.