AM 303 XPLR S Carbon Tubeless Disc Brake Center Locking 700c

The Zipp303 XPLR S is big upgrade in speed for gravel riders without a big price tag. This wheelset borrows key innovations from our premium wide gravel wheelset, it is affordable and robust for discerning gravel riders. This wheelset is the fastest on gravel, thanks to its mega-wide rim that integrates seamlessly with approved gravel racing tires.* Current gravel wheels are slightly modified versions of existing road wheels, focusing on high stiffness and low weight. Zipp takes a different approach, solely with speed in mind. In gravel, rolling resistance and vibration loss from rough surfaces, and wind are significant barriers to speed. To combat this, Zipp applied its Total System Efficiency design philosophy specifically to the challenges of gravel. The 303 XPLR S is a speed-focused gravel wheel designed with a new approach: Start with the perfect gravel tire and design a wheel around it. To develop this first-of-its-kind wheelset, Zipp engineers learned from studying how gravel racing has changed cycling in recent years, coming to several vital conclusions: 1. The progression of gravel speeds increases the importance of aerodynamic efficiency. 2. Current generation gravel wheels exhibit poor aerodynamic efficiency with gravel tires. 3. Low tire pressures arethe key for unlocking speed on gravel, but current gravel rim design providesinsufficient tire stance to support lateral cornering loads at lower tire pressures. 4. Current gravel rim designs do not help prevent pinch flats while using lower tire pressures. Typical tire widths for gravel racing range from 38-50mm with varying tread patterns. Current gravel wheel shave an external rim width of 28-30mm, which creates an aerodynamic mismatch when you use a 40mm+gravel tire. With that narrower rim and wider tire, the tire-wheel interface looks more like the bulge of alight bulb than the ideal seamless airfoil cross-section. According to Zipp testing, the efficient pairing of wheel and gravel tire of our 303 XPLR S design provides a 5-watt aerodynamic advantage over a leading competitor. This wheel is optimized for use with the Goodyear XPLR Slick and Goodyear XPLR Inter, both tires designed in partnership with Zipp. Low tire pressures significantly increases speeds on gravel. The problem with current gravel wheelsets is that an arrow tire bed with low tire pressures will cause the tire to collapse while cornering. The 303 XPLR S’s wide tire bed increases tire stance, allowing for lower tire pressures without tire squirm under corner loads. That means decreased vibration loss while maintaining predictable control in corners and unbroken traction while climbing. The 303 XPLR S also helps reduce pinch flats thanks to a rim edge that is 77 percent thicker than previous models, decreasing the chance for damage when the tire bottoms-out on the rim edge upon impact. What about rim depth? Conventional thinking suggests that shallow rims are best suited for gravel. As gravel racing has progressed, many gravel courses are raced at 35kph+ (~22MPH) with top speeds over 60kph(~37MPH). The 303 XPLR S rim is 54mm deep to create an effective aerodynamic complement for large gravel tires at high speed. Our research found that a 54mm deep rim creates the perfect aspect ratio for aerodynamic efficiency with a 40mm gravel tire at race speeds. * 303 XPLR SISONLY COMPATIBLE WITH APPROVED TIRES. The Goodyear XPLR Slick and Goodyear XPLR Inter are specifically designed and optimized for the 303 XPLR S

SPECIFICATIONS Wheel Size- 700c Rim Construction- Carbon–Hookless Hub- 76 /176 Rim Inside Width- 32mm Max System Weight- 286lb / 130kg Max Tire Pressure- 50 PSI / 3.45bar Weight(g)-1642g

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