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Shimano Disc Brake Adapters
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SM-MA-R160, IS/Post Rearsale $8.00![]()
SM-MA-R180, IS/Post Rearsale $8.00![]()
SM-MA-R203, IS/Post Rearsale $8.00![]()
SM-MA-F160, IS/Post Frontsale $8.00![]()
SM-MA-F180, IS/Post Frontsale $8.00![]()
SM-MA-F203 (160mm to 203mm), IS/Post Frontsale $8.00![]()
SM-MA-F180, Post/Post Front/Rearsale $5.98![]()
SM-MA-F203 (160mm to 203mm), Post/Post Front/Rearsale $8.00![]()
SM-MA-F180, IS/IS Frontsale $11.95![]()
SM-MA-F203 (180mm to 203mm), Post/Post Front/Rear$7.99
69 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
Gearhead Help
- Reviews
- Q & A
What do you think about this product?
Have questions about this product?
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.
Does its job
- Familiarity: I've used it once or twice and have initial impressions
Does what you need it to do!
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.
Does what it should
Easy to use and does exactly what it needs to do.
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!
Craig LGearheadMount 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.
Fritz HanselerGearheadWorks 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.
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.
Steven SheffieldGearheadSimple
- Familiarity: I've put it through the wringer
Easy to use and a good option for upgrading your rotors to a larger diameter
Matthew LundbergGearheadgreat
- 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!
johngchristGearheadIt 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.
Still an adapter
It does adapt correctly. Black anodized is nice. They should mill these out for weight savings haha
Adapts like it says
These are simple and easy. You don't need those oldschool cup and cone washers
It works
- Familiarity: I've used it several times
Comes with everything you need to increase stopping power. Easy to install with clear instructions included.
Jacob PopekGearheadI want to put a 203mm rotor on a rock shox pike using SRAM guide RSC brakes. What is the model of adapter I need.
Thanks,
R
I'm not sure, but this unit is for Shimano brakes.
i have a 2017 yeti sb6 and sram guide rs brakes with 180mm rear rotors now, is this the brake adaptor i need to use sram's centerline 200mm rotors in the rear? there's currently an adaptor installed
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
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
I have a Mach 5.7 pivot with fox float fit Tlc up front what brake adapters would I need to go to 160 in back and 180 up front
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?
I have a Mach 5.7 pivot with fox float fit Tlc up front what brake adapters would I need to go to 160 in back and 180 up front
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.
Don MyersGearheadI have done some homework on your disk brake adapter question, and you will have to use item “SM-MA-F160,P/S”. If you have any additional questions, please feel free to call or email me at dmyers@backcountry.com
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.
Hello, On this particular frame for the rear you would need a P/S adapter and on the front you would need a P/P adapter.
Thank You.
Is there a rear Post to Post adapter for...
Is there a rear Post to Post adapter for shimano brakes with 180 mm rotor?
The post to post 180mm mount for the front, will work on the rear.
is there a rear disc convertion or a non...
is there a rear disc convertion or a non disc bike
Yes there is. Upgrading your frame to a new one with built in brake mounts is your best choice, but if that isn't an option, you can try this! http://2btherapy.com/bikes/brake-therapy-conversion-kit
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!!
I pitty da foo...
I would not excuse the designation. Probably sold out of the 74-2-74 mounts. If it says IS it most likely is
Well pitty putty-
I'll be the eternal optimist; six designations, six pics, and one is P/P, good for the return at least and a damn good price as a generic adapter for all the mutts out there.
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)
Choose the Rear IS Frame for the size of rotor you are running. So all three will work but if you are running 160mm rotors get the 160 adapter.
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?
this adapter is to convert the post style mounts to shimano style mounts. If you have a 160 mm rotor, choose the Front 160. Or get a new fork.
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?
Brake track is very crucial, so caliper placement is important. 5mm shims may work on a 160 setup- if you can't find the correct adapter which I suggest.