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  • Shimano Disc Brake Adapters SM-MA-F160
  • Shimano Disc Brake Adapters SM-MA-F180
  • Shimano Disc Brake Adapters SM-MA-F203 (160mm to 203mm)
  • Shimano Disc Brake Adapters SM-MA-R160
  • Shimano Disc Brake Adapters SM-MA-R180
  • Shimano Disc Brake Adapters SM-MA-R203
  • Shimano Disc Brake Adapters SM-MA-F203 (180mm to 203mm)

Available colors

  • Shimano Disc Brake Adapters SM-MA-F160
  • Shimano Disc Brake Adapters SM-MA-F180
  • Shimano Disc Brake Adapters SM-MA-F203 (160mm to 203mm)
  • Shimano Disc Brake Adapters SM-MA-R160
  • Shimano Disc Brake Adapters SM-MA-R180
  • Shimano Disc Brake Adapters SM-MA-R203
  • Shimano Disc Brake Adapters SM-MA-F203 (180mm to 203mm)

Shimano Disc Brake Adapters

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    • SM-MA-F160, P/S Front
      Sale  $8.99
    • SM-MA-F180, P/P Front
      Sale  $6.95
    • SM-MA-F180, P/S Front
      Sale  $8.99
    • SM-MA-F203 (160mm to 203mm), P/P Front
      Sale  $8.99
    • SM-MA-F203 (160mm to 203mm), P/S Front
      Sale  $8.99
    • SM-MA-R160, P/S Rear
      Sale  $6.99
    • SM-MA-R180, P/S Rear
      Sale  $8.99
    • SM-MA-R203, P/S Rear
      Sale  $8.99
    • SM-MA-F180, S/S Front
      Sale  $6.95
    • SM-MA-F203 (180mm to 203mm), P/P Front
      Sale  $8.99
    in stock
    5.0 5 17

    17 Reviews

    Details

    Adapt.

    Whether you're trying to mount your 160mm rotor with an ISO or post-mount setup, we've got the right Shimano Disc Brake Adapters for the job. All you need is the skeleton key to understanding Shimano's admittedly byzantine model naming convention. SM-MA stands for Shimano Mount Adapter, so that'll be universal across models and can be safely ignored now that you're here.

    The rest of the model name is the important part. An "F" denotes front brake and an "R" denotes rear brake. The following number (160, 180, or 203) is, of course, the rotor size, with special parentheticals for 203mm rotor conversion. The final two initials respectively describe the caliper type and the frame/fork mount type with either a "P" (post-mount) or an "S" (ISO). To alleviate confusion, we've reiterated the front or rear specification at the back.

    To recap, model number SM-MA-F160, P/S Front is for the front brake (F), it accommodates a 160mm rotor (160), it holds a post-mount caliper (P), and it attaches to an ISO fork mount (/S).

    • Durable alloy construction
    • Mounting hardware included
    • Compatible with ISO and post-mount calipers and frames/forks
    • Item #SHI0108

    Tech Specs

    Recommended Use
    Stopping your bike

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Solution for the 2015 Fox Float +203mm

    • Familiarity:I've put it through the wringer

    Finally, a perfect solution when you have the 2015+ Fox Float fork and want to mount a 203mm front rotor. Much better than using a 180mm spacer + washers

    Factory Equipment

      What else would you use for Shimano Brakes? I decided to upgrade my front brakes from a 160 mm disc to a 180 mm. This part is necessary for that upgrade, moving the brake calipers 20 mm further from the hub to accommodate the larger disc. Works like a charm

      Road Disc Adapter for 140MM to 160MM

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

      Its a small package from Shimano, all of the proper fittings are included.
      There is a bit of confusion at the moment if you are installing a 160MM rotor on a disc equipped road bike. If you are stepping from a 140MM to a 160MM on your road fork, this is the most likely the part you need. Its simply a 20MM step that mounts inline post -to post on your fork, works if you are originating from a 140MM or 160MM. I used this with a Shimano RS785S setup and an ICE centerlock rotor. Works like a charm, no hassle.

      Road Disc  Adapter for 140MM to 160MM

      Thanks for the post. Any idea of this will also work for a rear brake. My Fuji CX is currently meant for 140mm rotors. Just curious if this adapter (SM-MA-F180, P/P Front) will also for the rear to make it work with a 160mm rotor. Thanks!

      Solid connection

      • Familiarity:I've put it through the wringer

      Slapped this on my fork so I could upgrade from a 180mm to 203mm front rotor. It works well and is super easy to install.

      My caliper aligns perfectly with the rotor making stopping easy and smooth. Just make sure you choose the correct adapter for the size rotor and mounting pattern on your bike.

      Replacement for my Tektro A-3 IS Adaptor

        I have been struggling with a problem in the rear brakes of my Giant (Talon)

        It uses Tektro 160 mm (picture).

        Lately, the rear brake is making a lot of VIBRATION. It resonates all the way to the bike handler and seat. Very uncomfortable indeed. In spite of the vibration, the brakes still work fine.

        I have discussed the matter with different people and someone suggested changing the caliper adapter for another one with a different format. I was thinking of trying the SM-MA-R160. Do you think it will work? If not, any suggestion?

        Replacement for my Tektro A-3 IS Adaptor

        I don't see how changing the adapter would have any real effect. you can try cooking the pads if you think they have oil on them, wiping your rotor down with alchohol, sand papering the rotor, changing pads, or a lot of the time it comes down to just upgrading the brakes. It's frustrating to fix a noise or vibration issue.

        Easy installation and perfect fit

        • Familiarity:I've put it through the wringer

        I upgraded to the new Shimano XT brakes and needed adapters. Perfect fit and exact pad alignment on the rotors. Get what works, close doesn't cut it for brakes.

        Unanswered Question

        I have a 2011 Specialized Stumpjumper 29er HT with RockShox Reba RL 29, 9mm-travel w/lockout (15.5": 80mm travel and I am hoping to install the Shimano XT SM-RT86 6-Bolt Disc Brake Rotor (180mm) on the front. I do not know which mounting bracket I need? Can you please help me? I really appreciate it.
        Thank You.

        Austin Blasingame

        Looking to put xtr 9000s on cannondale XLR carbon 90 Lefty, it had 180/160 rotors front & rear respectively. replacing XO brakes, what mounts do I need?

        Unanswered Question

        Following the formula outlined above I need an SM-MA-R180 P/P but don't see that as an available option for ordering. Does running that setup not require an adapter?

        Which adapter do I need for the rear brake on a Santa Cruz Bronson Frame? Using XT Brakes.

        What type of rear caliper mount type do I need for 2014 Niner EMD 9, is it ISO, P/S or P/P)? Also, what type of front caliper mount type do I need for RockShox Reba RLT with 15mm thru axle (P/P or P/S)? Thanks in advance.

        is there a rear disc convertion or a non...

        is there a rear disc convertion or a non disc bike

        I noticed all options above include IS...

        I noticed all options above include IS attachment, EXCEPT the pic of the "203 front" which appears as a post mount adapter for 8" remaining 74mm; such as all new shimano brakes are.
        BIG QUESTION: if I order the 203 front will I receive the 74 to 74mm, and excuse the IS designation (the photo goes with this selection, i believe). Thanks!!

        Which adapter do I use for post mount rear...

        Which adapter do I use for post mount rear frame tabs (new Turner have PM rear instead of 51mm IS)

        Standard Avid and Shimano post mount brakes will not need an adapter for 160mm rotors. Use one of them. You should not be able to run IS mount rear calipers on this frame. There maybe an adapter - but the rotors will have to be bigger - 203mm witch most likely will not fit the frame.

        I'm comfused, the item # shi0108 fits in...

        I'm comfused, the item # shi0108 fits in a post mount fork with IS caliper and 160 mm rotor?

        the 180 rear adaptor will fit the 170mm...

        the 180 rear adaptor will fit the 170mm rotor?

        Just a guess here, but that doesn't seem like it would be the hot set up. It would probably sorta work, but since the 180 adapter sets the caliper further from the axle, I think the pads might not get full contact with the rotor. The result of that would be poor braking and uneven/fast pad wear. What 170mm rotor are you rocking? Magura?