Shimano SM MA90 R180P/S Rear Disc Brake Mount Adapter Parts Brake Pads & Shoes

Shimano SM MA90 R180PS Rear Disc Brake Mount Adapter. This adapter enables you to mount Shimano post mount calipers to International Standard IS frames. While this adapter is specifically designed for XTR M985988 disc brakes, they can be used on all Shimano 74mm caliper brakes.

Price: $14.99 from

Bike Nashbar

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