Adding the Bearing Spacer Upgrade Kit to M1 Rear Hubs dramatically improves bearing durability and eliminates hub play associated with a unthreading preload adjuster. The Bearing Spacer Kit can be installed by retaillers or competent home mechanics.

Please note: All parts of the upgrade kit need to be used together for the kit to work.

To see an instructional video on how to install an M1 Bearing Spacer Upgrade Kit, please click here - Link opens in a new browser window