Shimano Mtb Brake Disc Adapter Pm A 180mm 203mm Brake Rotor Post Mount Converter Ultralight Mountain Bike Parts - Buy Shimano Sm-ma-f180p/p2 Bike Disc Brake Caliper Adapter For Front 180mm Bicycle,Shimano Original
Upgraded my SHIMANO ROTOR 160mm to 203mm with SHIMANO F203P/P DISC BRAKE ADAPTOR - YouTube
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Shimano Disc Brake Adapter, Front, SM MA F203P/P, (PM Caliper to PM Fork) 203mm | eBay