E*thirteen Sidekick Rear Disc Hub HB4UKA-213

- Designed to enhance suspension performance by eliminating pedal kickback\n- Front comes with 15mm and 20mm end caps for 110mm Boost\n- 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\n- 60T ratchet ring with innovative pusher driven pawl system provides silent operation and reduced drag by remaining disengaged unless pedaling\n- Adjustable pawl-pusher allows tool free tuning of deadband between 12, 15, and 18 degrees to suit rider preference and bike type