With the Shimano XTR and XT disc brake adapter for 180 mm rotors (SM-MA90) you can save a few valuable grams on your bike. This is because it has cut-outs that reduce its weight compared to conventional adapters. Of course it also works with other Shimano disc brakes and not only with the top groupsets for which it was developed. The adapter allows you, depending on the version, to mount a post mount brake caliper on an IS brake mount or to use a PM brake with 180 mm rotor on a PM frame for 160 mm direct mount.

Technical Information:

Adapter Material: aluminium
Bolt Material: steel
Rotor Size: 180 mm


PM to PM:
Frame/Fork Mount: post mount 6″
Caliper Mount: post mount
Increased Height: 20 mm
Included in Delivery: 1 x long bolt, 1 x short bolt, 1 x safety wire, 2 x A-type washers, 2 x B-tyre washers
Manufacturer Part Number: I-SMMA90F180PPC

rear IS to PM:
Frame Mount: international standard
Caliper Mount: post mount
Included in Delivery: 2 x bolts, 1 x safety wire
Manufacturer Part Number: I-SMMA90R180PS


– 1 x Shimano SM-MA90 180 mm adapter

Availability: 2 in stock Categories: , , ,
View cart


There are no reviews yet.

Be the first to review “SHM XTR BRAKE ADAPTER 180MM P/P”