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Shimano XTR R180P/S Disc Brake Adaptor for 180mm Rotor 74mm Caliper 51mm Frame | Propel Electric Bikes
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SHIMANO 160mm 180mm Brake Rotor Disc Brake Adapter Front Rear Brake Caliper Base Adapter Bike B Post Mount Adapter 51mm A Post
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Universal Cycles -- Shimano XTR MA90 Disc Brake Adapters [ISMMA90F160PS, ISMMA90F180PPC, ISMMA90R140PS, ISMMA90R160PS, ISMMA90R180PS]
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