Shimano SM-MA90 Disc Brake Adapter for Sale, Reviews, Deals and Guides
Retail Price:
$11.95
$11.95
Used Value:
$7.17
$7.17
Sale Value:
$10.76
$10.76
With the SM-MA90 Disc Brake Adapter, Shimano has taken an artful leap at the lowly disc brake adapter. Not only is it lighter than their older adapters, but it's more refined -- this refinement being the reason for its lightness. Where Shimano's older adapters were blocky, this one has curved edges. Where they were solid, this one has a window machined out of the center of the adapter body.
The Shimano SM-MA90 Disc Brake Adapter is available in five versions to fit 160 and 180mm rotors for front ISO or Post mounts and rear ISO mounts.
Specifications
Brand:
Compatibility:
Shimano front ISO/Post and rear ISO
Manufacturer Warranty:
1 year
Material:
alloy
Recommended Use:
getting calipers to fit correctly
Full Reviews
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, backcountry.com
April 2, 2019
April 2, 2019
It adapted my fork from 180 to 200. Its all I want in a brake adapter
Josh Spongberg, backcountry.com
July 28, 2018
July 28, 2018
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, backcountry.com
June 24, 2018
June 24, 2018
A must have to up your rotor size. Always great to upgrade!
Tyler Thunell, backcountry.com
December 26, 2016
December 26, 2016
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, backcountry.com
December 5, 2016
December 5, 2016
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., backcountry.com
October 28, 2016
October 28, 2016
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., backcountry.com
October 3, 2016
October 3, 2016
What you'll need to run a 180mm front rotor (or bigger). Pretty much does it as advertised.
Peter N, backcountry.com
July 31, 2016
July 31, 2016
Makes mounting 180 rotors a snap! Works as stated and light weight.
Eric B., backcountry.com
July 12, 2016
July 12, 2016
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, backcountry.com
July 8, 2016
July 8, 2016
Necessity when mounting disc brakes to a bike. Light and easy to install.
Dan Dalton, backcountry.com
July 8, 2016
July 8, 2016
I recommend using these instead of the sram break adapters for the guide breaks. easy to install.
Patrick W., backcountry.com
July 3, 2016
July 3, 2016
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.
backcountry.com
June 16, 2016
June 16, 2016
Pretty much necessary for most builds nowadays, these are a great choice!
Ben Rabinowitz, backcountry.com
May 27, 2016
May 27, 2016
So I use these to adjust my brakes.
Dane H., backcountry.com
April 4, 2016
April 4, 2016
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, backcountry.com
March 27, 2016
March 27, 2016
Light, and a necessity for running larger rotors out back in 180 size
Perry Hall, backcountry.com
March 4, 2016
March 4, 2016
I always upsize my rotors to 180, front and rear. These will get the job done.
Chase Skidmore, backcountry.com
October 14, 2015
October 14, 2015
used these to bring the rear up to 140 and front up to 160 on a specialized xc rig with xtr trail brakes
Ken C., backcountry.com
December 21, 2014
December 21, 2014
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.
Pete OBrien, backcountry.com
August 15, 2014
August 15, 2014
