Shimano Mount Adapter for Disc Brake Caliper SM-MA90-F180P/PC

The Shimano SM-MA90 is a lightweight magnesium adapter designed for post-mount to post-mount interfaces. It offers a high-performance, low-weight solution for upgrading rotor sizes while maintaining precise caliper alignment.

This adapter is required to run a 180mm rotor on 160mm mounts, or a 160mm rotor on 140mm mounts. It features a natural finish and is compatible with both front and rear applications.

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