Zipp 303 XPLR SW Rear Wheel

Zipp 303 XPLR SW Rear Wheel The Zipp 303 XPLR SW Wheelset is the fastest gravel wheel Zipp has ever developed; featuring a mega-wide and deep rim that integrates seamlessly with gravel tyres. Unlike current gravel wheels; which are slightly modified versions of road wheels focusing on high stiffness and low weight; Zipp’s design prioritises speed. Rolling resistance; vibration loss from rough surfaces; and wind are significant barriers to speed in gravel riding. To address these challenges; Zipp applied its Total System Efficiency design philosophy specifically for gravel. Speed-Focused Gravel Wheel: The 303 XPLR SW starts with the perfect gravel tyre and designs the wheel around it. Zipp’s engineers analysed recent changes in gravel racing; leading to several vital conclusions. Aerodynamic Efficiency: Increasing gravel speeds highlight the importance of aerodynamic efficiency. Current gravel wheels perform poorly aerodynamically with gravel tyres. The 303 XPLR SW; designed as a seamless airfoil cross-section with gravel tyres; provides a 5-watt aerodynamic advantage over leading competitors. Low Tyre Pressures: Essential for unlocking speed on gravel but current rim designs fail to support lateral cornering loads at low pressures. The 303 XPLR SW’s wide tyre bed increases tyre stance; allowing lower pressures without squirming; decreasing vibration loss while maintaining control in corners and traction while climbing. The rim edge is 77% thicker than previous models; reducing pinch flats and potential damage when tyres bottom out. Rim Depth: Contrary to conventional thinking that shallow rims are best for gravel; the 54mm deep rim of the 303 XPLR SW creates an effective aerodynamic complement for large gravel tyres at high speeds (35kph+). The deep rim creates the perfect aspect ratio for aerodynamic efficiency with a 40mm gravel tyre at race speeds. Tyre Compatibility: Optimised for use with Goodyear XPLR Slick and Goodyear XPLR Inter tyres; both designed in partnership with Zipp. Tyre Widths: Typical widths for gravel racing range from 38-50mm. The 303 XPLR SW wheelset represents a groundbreaking approach to gravel racing; focusing on integrating tyre and wheel design to deliver unparalleled speed; comfort; and performance.