ShimanoDisc Brake Adapters
Item # SHI0108
Like much of life, making your Shimano disc brakes work with your 160mm rotor is easy --once you learn how to figure out which adapter you need. Whatever you have, we can either sell you the adapters to make it work, or tell you that what you have is enough.
You need to know three things -- what kind of mount your Shimano disc caliper is, International Standard (ISO) or post mount. If it goes on the front, you need to know what your fork is: ISO, post-mount, or a few special cases (Marzocchi 20mm axle, Boxxer-type). And, you need to know the rotor size that you're trying to fit -- in this case, it's 160mm. If you're trying to diagnose what you already have and/or what you need, here's how to do it. The Shimano adapters all have a model number that starts with SM. The Mount Adapter acronym is MA. Front brake is F. Rear brake is R. Rotor Size is 160, 180, or 203. Caliper Mount Type will be S for ISO/International A, and P will represent Post. And the last letter will be for the frame or fork mount type: S for ISO/A, P for Post, B for Boxxer, Z for Marzocchi 20mm Axle as well as QR20Plus and DH ISO. Thus an adapter that reads SM-MA-F-203S/P is Shimano Small Parts Mount Adapter Front 203mm Rotor with ISO caliper on a Post type fork.- Durable alloy construction
- Mounting hardware included
- Compatible with ISO and post-mount calipers and frames/forks
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What do you think about this product?
View
April 30, 2020
Fits as advertised - easy to use
- Familiarity:
- I've put it through the wringer
Not a ton to write - the adapter is easy to install, true to size and easy to dial in, stays dialed in, and reasonably priced. It's very straightforward - kind of like getting an A on a first grade spelling test, but hey, it's an A.
Russ Green
January 12, 2020
Adapter, bolts and no washers.
- Familiarity:
- I've used it once or twice and have initial impressions
I ordered this to mount my Shimano M8020 caliper to my front fork paired with a 203mm rotor. The packaging includes the adapter, and 2 mounting bolts. BEWARE; no cup and cone washers are included. I feel that the washers should be included but understand they are not necessary. Wish they were more clear about what’s included in the packaging. 4 out of 5 starts because the washers should be included. The washers came with my rear adapters.
sti3752917
December 9, 2019
I am looking at the 160 to 203 post to post adapter. The photo of the part appears to be wrong. Will the part sent actually be a post to post adapter? The one shown is is to post. Thanks
duncan_des844548
July 26, 2019
203mm brakes on RM Instinct
I loved my X2's with 180mm rotors, but I wanted more braking power without spending $500+ dollars for 4-piston brakes. So I did what a lot of people do in my situation and bought big ol' rotors and some adapters. For $100, I picked up rotors and adapters and I now have a noticeable increase in power while keeping the brake set I love. As others have said, the part numbers are very confusing, so hopefully these photos will clarify what's needed for 160mm and 180mm post mount applications. Sidenote: I was advised to avoid the Hope 203mm two-piece rotors on the Fox 34 due to clearance issues. I'm glad I chose the one-piece. It's a very tight fit but they clear, and they're about $15 less. Stoked!
Tim J
July 26, 2019
Shimano brake adapter 180 to 203
Part # SM-MA-F203 (180mm to 203mm), Post/Post Front/Rear Hope X2 brakes with 203mm Hope one-piece rotors onto my Rocky Mountain Instinct (180mm post mount).
Tim J
July 26, 2019
Shimano brake disc adapter 160 to 203
Part # SM-MA-F203 (160mm to 203mm), Post/Post Front/Rear Mounted Hope X2 brakes with Hope one-piece 203 rotors on my Fox 34 (160mm post mount ) fork. I recommend one-piece rotors on the Fox 34 to avoid clearance issues. It's a tight fit.
Tim J
May 26, 2019
looking for front fork Post mount to Flat claiper, 160mm Center lock disc adaptor, for 2015 Cannondale 12
Alex
May 16, 2019
Perfect.
- Familiarity:
- I've used it several times
Got some to make my ripmo 203 F/R. Some pictures don't actually match what you're getting.
Jordan Porter
April 18, 2019
Works with SRAM Guides
- Familiarity:
- I've put it through the wringer
Used this for a hardtail build. The profile worked well with the shape of the SRAM Guide RSC calipers.
Katie Harker
November 19, 2018
As Expected
- Familiarity:
- I've put it through the wringer
Does its thing and does it well. No complaints for this here.
taylor
October 24, 2018
What is the purpose of the little plastic clips that come with the mounting hardware?
David M.
David M.
November 6, 2018
Since asking this question I found the answer in a Shimano service manual. For anyone curious, the little plastic clips are supposed to be attached to the bolts after they are tightened to prevent them from loosening over time. The bolts come with thread lock already applied so the clips don't really seem necessary, and that explains why everyone gets by just fine not knowing what they are for.
September 6, 2018
Part works great, Part #'s not so much
- Familiarity:
- I've put it through the wringer
If you need it you need it. Simple adapter to hook it up. Hit us up if you have any questions on the application for your bike.
Robert Jensen
August 26, 2018
For forks with 180mm mounts
My fork has 160mm mounts so this one doesn't work for using a 203mm rotor.
Ben Brown
August 6, 2018
A must.
Shimano's part numbers can be confusing. Be sure to hit the "Chat Now" button to get help from a Gearhead who can help confirm the correct adapter for your frame.
Andrew Meehan
July 18, 2018
good luck!!
- Familiarity:
- I've used it several times
work great if you can figure out shimanos part numbers and fitment!!!....wooo hoooo!
Shae
July 15, 2018
Necessary
- Familiarity:
- I've put it through the wringer
Great little adapters to ensure that your brakes fit your bike.
Sunn Kim
June 21, 2018
Required parts
- Familiarity:
- I've put it through the wringer
If you want to follow the trend of having a 180mm rotor for the rear brake, you will need this if you have a Santa Cruz or any other brand that uses an international standard brake mount.
TomJ
June 8, 2018
Does its job
- Familiarity:
- I've used it once or twice and have initial impressions
Does what you need it to do!
Taylor Bentz
May 1, 2018
Necessary
- Familiarity:
- I've put it through the wringer
Works well with not only Shimano, but other brands as well. Just be sure to get the correct one for your application and should be smooth sailing.
Kevin K
April 9, 2018
Does what it should
Easy to use and does exactly what it needs to do.
Ben B.
Laurel Worthen
December 13, 2019
Hi Mike- We unfortunately, don't have a picture for each one but the dropdown will be correct for the one you are wanting!