Designed to enhance suspension performance by eliminating pedal kickback. Front comes with 15mm and 20mm end caps for 110mm Boost. Proprietary freehub mechanism disengages the drivetrain from the rear wheel when coasting and an adjustable engagement deadband filters kickback and chain vibration before it reaches the pedals. 60T ratchet ring with innovative pusher driven pawl system provides silent operation and reduced drag by remaining disengaged unless pedaling. Adjustable pawl-pusher allows tool free tuning of deadband between 12, 15, and 18 degrees to suit rider preference and bike type