JJBP Rear 6-Bolt Boost Disc Rotor Spacer at 3 mm thickness plus longer screws for mounting a 12x142 hub in a Boost 148 mm-spaced frame. Kit also includes 2x 3 mm hub spacers for centering the wheel in the frame.
Because the cassette now sits 3 mm further inboard, the rear derailleur limit screws will need to be adjusted to compensate. In some rare instances, the rear derailleur may not be able to travel far enough inboard to reach the innermost (largest) cog. Please reach out if encountering this issue and we can work out the best solution.
