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Detail Images

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

Current Color

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

Shimano Disc Brake Adapters

sale $5.72 - $12.99

Free 2-Day shipping on orders over $50*

Select your style & size:

Select options
  • Select options
    • SM-MA-R160, IS/Post Rear
      $8.99
    • SM-MA-R180, IS/Post Rear
      $8.99
    • SM-MA-R203, IS/Post Rear
      $8.99
    • SM-MA-F160, IS/Post Front
      $8.99
    • SM-MA-F180, IS/Post Front
      $8.99
    • SM-MA-F203 (160mm to 203mm), IS/Post Front
      $8.99
    • SM-MA-F180, Post/Post Front/Rear
      sale $5.98
    • SM-MA-F203 (160mm to 203mm), Post/Post Front/Rear
      $8.99
    • SM-MA-F180, IS/IS Front
      sale $5.72
    • SM-MA-F203 (180mm to 203mm), Post/Post Front/Rear
      $7.99
    5541

    41 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?

    Make your rotors fit your frame

      This simple piece of metal makes it possible for you to reach unprecedented speeds biking, and come back alive. simply select the version you need, attach it to your frame and caliper, and magically when you squeeze the lever on your bar, you will begin to slow down. Amazing.

      go big, go bigger

      • Familiarity: I've put it through the wringer

      Built a Jones bike recently and JeffJ advocates 203mm rotors up front, 180mm in back. Needed the appropriate adapters to get the discs around those big rotors. Mounted quickly, adjusted appropriately. Worked perfect.

      Making brakes and rotor get along

      • Familiarity: I've put it through the wringer

      So you got new brakes and rotors, awesome! Now you need to make everything play nice. There are a number of different adapters to go from all the different rotor sizes and mounting standards. You can look up what you need or ask a bike CS rep, but if you're rocking Shimano brake set up, these will have the peace maker for your bike.

      Fox 36 YES

      • Familiarity: I've put it through the wringer

      Finally, a cheap solution to mounting my 203mm rotor to my Fox 36 perfectly. Couldn't believe Fox wanted $35 for the 180mm to 203mm P/P adapter. I love their stuff but come on. Shimano for the win

      Gotta Have It

      • Familiarity: I've put it through the wringer

      Cracking the Shimano-speak code to figure out which one you need is the hardest part. Once you have the right one, it's easy to install, and does what it needs to do. Never had an issue with any of these that I've used.

      Better Choice than Avids

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

      I originally got the Avid Post Mount Brake Adapters (Item #AVI000D) for my new SRAM Guide RSC Disc Brakes but swapped them for these Shimano Disc Brake Adapters. Much better choice and cleaner look on my bike, no extra washers or spacers required.



      Big thanks to Joe Bolton in our Retail Store Bike Shop for getting my new Mach 6 put together. If you are ever in Salt Lake City definitely stop by our Retail Store to check out their bike selection and visit Joe (2607 S 3200 W, Suite A, West Valley UT 84119). Contact me with any questions about these adapters, especially if you are interested in custom building a new mountain bike.



      Kyle L. - Expert Gearhead - klivingston@backcountry.com - 801-736-4337



      Frame - Pivot Mach 6, Large Stealth Black/Green

      Brakes - SRAM Guide RSC Disc Brake - Black Ano, 180mm front/180mm rear

      Adapters - Shimano SM-MA-F180, P/P Front

      Better Choice than Avids
      Unanswered Question

      I have a realm beach cruser from the 60s it comes stock with springer forks I would like to put a disc brake on the front is there a adapter that will work on the springer forks for a disc brake. I'm about ready to give up and go for a drum brake. Thanks

      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?