Shimano XTR SM-MA90 Brake Caliper Adapter—Postmount to Postmount—140/160 mm direct-mount forks and frames for 160/180 mm disc brake rotors.

This adapter can mount a 20 mm larger brake disc on the front or rear wheel. The brake mount on the fork and the frame must comply with the post mount standard!

The adapter extends the standard brake disc size of the fork or rear triangle by 20 mm. Please check which post-mount variant is installed in your fork or rear triangle. Based on the standard brake disc size, the adapter increases the brake disc size by the specified information in millimetres.

PM5 = 140mm standard size
PM6 = 160mm standard size
PM7 = 180mm standard size
PM8 = 200/203mm standard size

Adapter to facilitate the use of a larger brake disc in combination with a Postmount fork or frame and a Postmount brake. The adapter can be utilized in the following manner:

fork with 140 mm mount: SM-MA90-F180P/P for the use of a 160 mm brake disc
fork with 160 mm mount: SM-MA90-F180P/P for the use of a 180 mm brake disc
frame with 140 mm mount: SM-MA90-F180P/P for the use of a 160 mm brake disc
frame with 180 mm mount: SM-MA90-F203P/P for the use of a 203 mm brake disc

Note:To use a 203 mm disc at a 160 mm at the fork, you need the adapter SM-MA-F203P/PA (Bike24 ID: SHI103313)

Designed for BR-M985 and BR-M988, but can be used on all Shimano 74mm-caliper brakes.
Package contents: 1 adaptor.
Material: aluminum

SKU# ISMMA90F180PPC

*Note: Images are for representational purposes only. Actual size/packaging varies with product type/size.

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Shimano Brake Adaptors | XTR SM-MA90 Brake Caliper Adapter - Postmount to Postmount