Zipp ZR1 Freehub Body SRAM XD-REngineered for speed and versatility, the Zipp ZR1 Freehub Body allows you to seamlessly integrate SRAM 12 speed XDR road or XD mountain bike cassettes onto your wheelset. This precision component is the key to unlocking a wider gear range, ensuring your drivetrain remains responsive and perfectly engaged during every sprint or climb. Key Features Instant Engagement: Features a robust pawl design for quick engagement and a direct, snappy feel under