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QM12 Adapter Bracket. Adapts Post-mount (PM) caliper to International Standard (IS). This bracket works for both fork and rear-frame mounting.

For use if mounting a 180mm Rotor to the Front wheel with a PM caliper to an IS mount 

For use if mounting a 160mm Rotor to the Rear wheel with a PM caliper to an IS mount

 

Please refer to the chart in the images for further information.