Muc-Off Crank Preload Ring Black

The Muc-Off Crank Preload Ring is a durable, precision CNC machined 7075 piece of hardware. You can precisely adjust the ‘preload’ tension on the bottom bracket bearings to remove the side-to-side play and slack in thru-spindle bottom brackets, to help max the life of your bottom bracket bearing with creak-free rides.