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Depending on what size rotor you use, you will need a brake adapter to properly space your disc brake caliper. There are two standards for disc brake mounts: IS: 51mm International Standard, PM: 74mm Post Mount SM-MA90 series brackets are specifically designed for the new generation XTR-M985/988 disc brakes but can be used on all Shimano 74mm-caliper brakes Mounting Hardware Included.
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🇺🇸 Ship from USA · On Agora since 2026
$12.00