Does the job like a boss

This adapter does exactly what it's supposed to. If you have post mounts and want to size up your rotors, this is the one you need. Not sure anyone actually uses the included safety wire, but its cool that Shimano includes it.

Eric White

Works Wonderfully

Familiarity:

I've used it several times

It adapted my fork from 180 to 200. Its all I want in a brake adapter

Josh Spongberg

Best brake adapters

Familiarity:

I've put it through the wringer

Shimano makes the best brake adapters. I don't always run Shimano brakes but I always use their adapters. They are easier to set up than others on the market and seem to be the best design available.

Dan Be

Make it allllll work!

A must have to up your rotor size. Always great to upgrade!

Tyler Thunell

Adapt it

Familiarity:

I've put it through the wringer

Nothing better for running a larger rotor than the correct adapter. I used the Shimano adapter to go from a 160mm to 180mm post mount fork.

Brett Cole

So you went XTR

We see that, and we respect that. Now, make sure that everything plays nicely together by making sure you use the correct hardware. These not only drop weight, but use a different bolt to match with the XTR calipers.

Dane H.

Not just for 180

Familiarity:

I've put it through the wringer

Got the 180 post mount adapter. Essentially its a 10mm spacer used to increase rotor size by 20mm. Worked great with TRP HYRD to mount 160mm rotors on a Ritchey cross fork. Also used it to swap up from 160 to 180 front rotor on my mtb bike. Does what it needs to do.

William K.

Lets you run a 180mm front

What you'll need to run a 180mm front rotor (or bigger). Pretty much does it as advertised.

Peter N

What you will need!

Makes mounting 180 rotors a snap! Works as stated and light weight.

Eric B.

Highly Adaptable

Familiarity:

I've put it through the wringer

These can be a little confusing, call a competitive sales rep if you need guidance. The Shimano adaptors are primo, and work nicely with Shimano brakes, or whatever else you happen to be using.

Garson Fields

Mount up

Familiarity:

I've used it several times

Necessity when mounting disc brakes to a bike. Light and easy to install.

Dan Dalton

used them with guide breaks

Familiarity:

I've put it through the wringer

I recommend using these instead of the sram break adapters for the guide breaks. easy to install.

Patrick W.

Basic excecution

Familiarity:

I've put it through the wringer

It is amazing that a seemingly basic component can be done in so many different ways at different degrees of successful execution. Shimano does theirs very well. keeps the caliper stable and in the correct position with very little, if any flex. You need this adapter for most builds today.

Correct spacing

Familiarity:

I've used it once or twice and have initial impressions

Pretty much necessary for most builds nowadays, these are a great choice!

Ben Rabinowitz

I like big rotors

Familiarity:

I've put it through the wringer

So I use these to adjust my brakes.

Dane H.

gotta have it

Familiarity:

I've used it several times

My fat bike came with hydraulic 160mm rotors in front and back. For winter, I wanted mechanical brakes and figured I'd upsize the front. Need an adapter to accommodate the 180mm rotor. I used this even though installing TRP Spykes with an centerline rotor--it's all working well together.

Josh R

Does the job

Familiarity:

I've put it through the wringer

Light, and a necessity for running larger rotors out back in 180 size

Perry Hall

What is the difference between MA and MA90 Shimano PN brake adapters?

Aaron Paul

I have a 140 post mount rear and I want to use a 160 disc rotor, which adapter do I choose?

Jason P.

180s 4eva

Familiarity:

I've put it through the wringer

I always upsize my rotors to 180, front and rear. These will get the job done.

Chase Skidmore