Free Shipping on orders over $50* 100% Guaranteed Returns
1-888-276-7130
  • Shimano Disc Brake Adapters
  • Shimano Disc Brake Adapters
  • Shimano Disc Brake Adapters
  • Shimano Disc Brake Adapters
  • Shimano Disc Brake Adapters
  • Shimano Disc Brake Adapters
  • Shimano Disc Brake Adapters
  • OptionsShimano -
  • Shimano -
  • Shimano -
  • Shimano -
  • Shimano -
  • Shimano -
  • Shimano -
ShimanoDisc Brake Adapters
Sale $5.98 - $11.95

Item # SHI0108

Select options
  • Cancel
  • Select options
  • SM-MA-R160, IS/Post Rear ($8.00)
  • SM-MA-R180, IS/Post Rear ($8.00)
  • SM-MA-R203, IS/Post Rear ($8.00)
  • SM-MA-F160, IS/Post Front ($8.00)
  • SM-MA-F180, IS/Post Front ($8.00)
  • SM-MA-F203 (160mm to 203mm), IS/Post Front ($8.00)
  • SM-MA-F180, Post/Post Front/Rear ($5.98)
  • SM-MA-F203 (160mm to 203mm), Post/Post Front/Rear ($8.00)
  • SM-MA-F180, IS/IS Front ($11.95)
  • SM-MA-F203 (180mm to 203mm), Post/Post Front/Rear ($7.99)
  • 100% Guaranteed Returns
  • Free Shipping on orders over $50

Item # SHI0108
Description

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
Weight
Weight

Actual Weight

Actual weights are measured in-house by the Competitive Cyclist team.

Have questions? Chat with a Gearhead

Grams

Oz

SM-MA-R160, IS/Post Rear
610g
21.52oz
SM-MA-R180, IS/Post Rear
610g
21.52oz
SM-MA-R203, IS/Post Rear
610g
21.52oz
SM-MA-F160, IS/Post Front
28g
0.99oz
SM-MA-F180, IS/Post Front
28g
0.99oz
SM-MA-F203 (160mm to 203mm), IS/Post Front
28g
0.99oz
SM-MA-F180, Post/Post Front/Rear
34g
1.20oz
SM-MA-F203 (160mm to 203mm), Post/Post Front/Rear
34g
1.20oz
SM-MA-F180, IS/IS Front
47g
1.66oz
SM-MA-F203 (180mm to 203mm), Post/Post Front/Rear
34g
1.20oz
Weight is for brake adapter with hardware.

Reviews & Community

REVIEWS

Write a review

    Add a:
  • Photos
  • Videos

No file chosen

Rather attach a photo from your computer?

Familiarity:

Only jpg, jpeg, png, gif or bmp files please.

Submit ReviewCancel

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.

For forks with 180mm mounts

    My fork has 160mm mounts so this one doesn't work for using a 203mm rotor.

    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.

      good luck!!

      • Familiarity: I've used it several times

      work great if you can figure out shimanos part numbers and fitment!!!....wooo hoooo!

      Necessary

      • Familiarity: I've put it through the wringer

      Great little adapters to ensure that your brakes fit your bike.

      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.

      Avg. ride time: 2h 48m per week
      • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

      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.

      Works as intended

      • Familiarity: I've put it through the wringer

      You will likely need one or two of these to mount up your disc brakes, get the right ones for your set up and youre good to go!

      Mount it up

      • Familiarity: I've put it through the wringer

      Durable and easy to install, brake adapters are necessary on many frames and forks if you are running a larger rotor size.


      Works with Avids Too

      • Familiarity: I've put it through the wringer

      These work for any brakes as far as I know, I used them to mount my Guide brakes with some 203 rotors. So if you have trouble finding certain adapters for certain brands in stock ever, know that you can cross brands since the spacing is all standardized. Full disclosure, can't guarantee it works with all brands/caliper shapes. But I have used shimano adapters with several sets of Guide brakes over the last few years so I can say that works for sure.

      Avg. ride time: 22m per week
      • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

      Works great.

      • Familiarity: I've put it through the wringer

      These work great and are easy to install.

      they're great!

      • Familiarity: I've put it through the wringer

      These make it super easy to swap to a larger or smaller brake rotor with ease. Just make sure you know which one to buy. The description breaks it down for you if you're confused.

      Necessary for larger rotors

      • Familiarity: I've used it several times

      Got a fork that’s built for a smaller rotor than the one you want to use? This is the answer. Just make sure you order the right one for the mount and caliper.

      Simple

      • Familiarity: I've put it through the wringer

      Easy to use and a good option for upgrading your rotors to a larger diameter

      Avg. ride time: 4m per week
      • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

      great

      • Familiarity: I've put it through the wringer

      i love running bigger rotors so In return I love that this lets me run them! never had an issue with these!

      It Works

      • Familiarity: I've put it through the wringer

      If you are using Shimano brakes this is a must have. Super easy to match up what you need.

      Gotta have it

      • Familiarity: I've put it through the wringer

      You gotta have adapters if running a larger rotor. The Shimano adapters do the trick.