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ShimanoXT SM-RT86 Rotor - 6-Bolt

Sale 28% Off$35.77 - $49.49

Item # SHI001B

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  • One Color, 160mm ($35.77)
  • One Color, 180mm ($41.99)
  • One Color, 203mm ($49.49)
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Item # SHI001B

Stay frosty.

Functionally, XT SM-RT86 Disc Brake Rotors stop equally in comparison to Shimano's apex XTR line. That's because of IceTech, a shared technology on both models. The difference between the two lies in a slightly lighter XTR spider that's reserved for gram-obsessed racers. Weight difference aside, the XT rotors provide the same cooling benefits to help your brakes stay frosty and on point when you're testing the ragged edge for extended periods of time.

In reality, most of us aren’t going to feel the benefits of a few grams lost when they're so centrally located to the hub. However, what we are going to profit from is the three-piece Ice Tech Rotor. It is essentially two pieces of steel optimized for friction sandwiched over an aluminum core.

This means Shimano is utilizing the high thermal conductivity of aluminum, where other manufacturers solely use steel throughout the braking surface. Additionally, the quicker cooling alloy core more efficiently transfers heat to the alloy spider. The resulting cooler operating brakes will last longer and provide more consistent stopping in the most trying conditions.

  • A workhorse brake rotor for XC, trail, and all-mountain use
  • IceTech steel/aluminum sandwich dissipates heat
  • Aluminum spider further contributes to heat management
Tech SpecsWeight
Tech Specs
steel, aluminum
Attachment Type
160 mm 180 mm, 203 mm
Recommended Use
mountain bike
Manufacturer Warranty
2 years

Actual Weight

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

Have questions? Chat with a Gearhead



One Color, 160mm
One Color, 180mm
One Color, 203mm

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Work great

    These rotors cool fast so you don't lose braking power on long downhills. I have them on all my bikes. They last a long time and work well with the ice pad. They stay quiet too.

    Work great

    for the 203 needs better shipping

      I got the 180mm and it was perfect. The 203 needs to be taken to a mechanic to have it fixed.

      Cool rotors

      • Familiarity: I've used it several times

      I got the Ice tech rotors to replace my stock SRAM rotors that were always over heating, I'm impressed with their ability to stay cool on long descents, so far no issues at all, I love them!

      Will the XT SM-RT86 rotors work with XTR BR-M9000 brake calipers? What are the best 6 bolt rotors to use with the XTR BR-M9000 brake calipers? What size rotors should I use for XC riding? I'm leaning towards 160mm. I'm not sure if this info will be helpful in answering my questions, but my bike is a Pinarello Dogma XC with Mavic Crossmax Pro Carbon rims, and my weight is around 200lbs while dressed for riding. Thank you for helping me with these questions.

      Yes they will work GREAT, shimano recommends this rotor for the 6 bolt down hill bikes. Most people for XC will have 180mmin front and 160mm in rear, but the bigger 203mm in front will keep it cooler if that becomes an issue, just need a mount adapter to fit to your forks.

      Any 6 bolt disc rotor will work, but these are a great choice.

      Hope this anyone who has this question.

      arrived bent

        Box was in great shape, no sign of damage, but the rotor was bent enough that it wasnt useable until I spent 2 hours bending it back into shape, which I couldve just done with the original.....

        same here, the 180 was fine but the 203 needs work

        Awesome Rotors - Great Deal

        • Familiarity: I've put it through the wringer

        Great rotors for the price. Fairly light weight, shed heat well and I think look pretty good too.


        • Familiarity: I've put it through the wringer

        Shimano is killing the stop game. Can't be beat!

        Sweet Rotors!

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

        I bought these as an upgrade to my Shimano Deore M615 brakes. They run cool and quite with the IceTech finned pads. They look great too! Highly recommend.

        Sweet Rotors!

        Quiet and easy

          The iceshield on these rotors keeps them very quiet even after hours of use on downhill runs. Easy to install.

          Great Rotor

            These rotors paired with Shimano brakes are outstanding. If you want increased braking power, especially on longer descents, get these! Also- getting a larger rotor will help with increased braking power, just make sure you have the proper adapter for your bike if you’re increasing the size of the rotor. I would be hesitant to mix and match rotors and brake calipers of different brands (Shimano/SRAM/Magura) because of different rotor thicknesses…I would definitely recommend if you currently have lower end Shimano rotors or are just looking to replace your XT rotors.

            Go to rotor

            • Familiarity: I've put it through the wringer

            These are the only rotors I'll run on the mountain bike! Feel free to shoot me an email at jdraper@backcountry.com if you don't know which size is going to work best for you!

            New rotors are the best!

            • Familiarity: I've put it through the wringer

            Having new rotors AND new brake pads is like having new brakes.
            Love it!

            super reliable

            • Familiarity: I've put it through the wringer

            For the money the XT rotors can't be beat. great longevity, great braking power, have not had any heating issues. Highly recommended.

            Reliable Quality

            • Familiarity: I've put it through the wringer

            I usually use SLX rotors but these work great too for not much more money. Are they lighter, faster, better? Probably, I don't know, the difference isn't too noticeable for me personally but if you are heating up your brakes frequently, these should dissipate that heat better.