Shimano SM-MA90 Disc Brake Adapter reviews and deals for sale

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.

Works Wonderfully

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

Best brake adapters

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.

Make it allllll work!

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

Adapt it

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.

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.

Not just for 180

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.

Lets you run a 180mm front

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

What you will need!

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

Highly Adaptable

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.

Mount up

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

used them with guide breaks

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

Basic excecution

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

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

I like big rotors

So I use these to adjust my brakes.

gotta have it

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.

Does the job

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

180s 4eva

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

just works

used these to bring the rear up to 140 and front up to 160 on a specialized xc rig with xtr trail brakes

Upgrade to 180

I recently installed new rotors on my Santa Cruz Tallboy LTC. After riding a friends bike which had 180mm rotors front and rear, I decided I'd do the same. It's made a noticeable difference for sure. I got the Post for the front and the ISO option for the rear. Just a heads up sometimes ISO is referred to as IS.

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

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

What is the Thin Metal Wire used for, that is included?

Will this adapter work with shimano xt...

Will this adapter work with shimano xt brakes on a Fox float RL fork (with post mount). Trying to put on a 180mm rotor but want to make sure i get the right adapter. Thanks.