Black anodized CNC machined billet aluminum construction. Used to upgrade from the stock caliper to a single 108mm radial caliper on the rear of your M8 Softail. Works in combination with the stock 25mm rear axle and brake rotor sizes up to 320mm. - Will replace the stock 41300194 rear caliper mount bracket - For installing 108mm radial caliper bolt spacing - No modifications required - Fits with stock 25mm diameter rear axle - Allows up to 320mm brake rotor diameter - Radial caliper hardware kit is optional available (985741 (60mm), 985745 (70mm), 985746 (80mm). Note: Caliper spacers may be needed to space off your caliper to the appropriate height depending on your rotor size. Note: Although OEM 41300194 bracket is identical for all M8 Softails, Kraus has another for the 2020-up Softail Low Rider S/ST as fitment has a different mounting position/offset from other M8 Softails.