Shimano Disc Brake Adapter
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.
Shimano Disc Brake Adapter:
PM160 - 180mm: ESMMAF180PP2A -
PM160 - 203mm: ISMMAF203PPA -
PM180 - 203mm: ESMMAF203PPMA -
PM180 - 220mm: ESMMAF220PPM -
PM200 - 220mm: ESMMAF220PPL2 -
IS-Rear - 160mm: ISMMAR160PSA -
IS-Rear - 180mm: ISMMAR180PSA -
IS-Rear - 203mm: ISMMAR203PSA -
XTR PM180 - 203mm: ISMMA90F203PPM -
PM203 - 220mm: ESMMAF220PPL
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