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Item # SHI001B

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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 Specs

steel, aluminum
Attachment Type:
160 mm 180 mm, 203 mm
Recommended Use:
mountain bike
Manufacturer Warranty:
2 years

Reviews & Community


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Great Rotors

  • Familiarity: I've put it through the wringer

I've got these rotors on my mountain bike to accompany my Shimano XT brake systems. The stopping power is awesome and they have held their shape after a few good crashes. They're durable and hard to beat!

Major Upgrade in Stopping Power

    I use these rotors in all things mountain biking, and this time around, I decided to install them on my cross bike... LIKE WHOA!

    Stopping power is up 10 fold this season, and I am kicking myself for not switching to them sooner.

    This is a cheap and simple upgrade, get them NOW!

    Easy DIY

      Get yourself a digital caliper and check width every time you check your chain wear. Shimano prints on disc the min width at 1.5mm.

      Handheld drill + torque wrench make for quick change. Don't forget the loctite. I usually give the hubs a good cleaning before installing new. Check pad wear too!

      Great rotor!

        I bought these to replace the worn out and bent factory Formula rotors my bike came with stock. I've got these rotors paired with EBC's green formula pads and I noticed a huge difference in stopping power over my old rotors the first lever pull! I assume they stay cool enough, I've never bothered to bail off the bike and touch the rotor or bad to see how warm they really are after a long descent, but I've never had brake fade issues with these rotors.

        Great rotor!

        So Icy

        • Familiarity: I've put it through the wringer

        If you're running Shimano brakes and your hubs have a 6-bolt mount, these rotors are the best that Shimano has to offer. Light, sweet looking, and they seem to stay cool enough. Sure the XTR-level rotors get the fancy radiator fins, but then again, most of us probably aren't willing to buy Centerlock hubs for the negligible cooling benefits.

        Still the standard!

        • Familiarity: I've put it through the wringer

        Great performance, priced right and very durable. I tend to be hard on brakes and the XT rotors seem to be able to take more punishment than most. Jonathan gives a great piece of advice in the review below; pay attention to the torque specs! Also, stagger tightening the bolts in a "star" pattern and work up to the torque spec.
        More info here: http://www.shimano.com/media/techdocs/content/cycle/SI/DiskBrakeSystem
        If you need a torque wrench, check out the Park Tool Ratcheting Torque wrench (Accessories /Tools & Maintenance /Tools Tools for the Shop/ Wrenches). Definitely a worth-while investment!
        If you have any questions or for additional information, please feel free to reach out to me directly.

        Ed Kilbourn
        Gearhead - Bike
        Office: 801–736-6396 x4670

        Easy to swap out

          Bent my rotor on a rock. A new one showed up quick and was so easy to change out. Pro Tip: pay attention to the torque specs when installing. One wouldn't want brake discs getting loose. Use blue loctite.

          Easy to swap out

          Great addition to my XT brakes

          • Familiarity: I've used it several times

          These rotors are great - they don't fade a bit, zero noise, and heck, they look kinda cool too. A good, cheap upgrade you can easily do yourself!

          Great addition to my XT brakes

          Ice, Ice, Ice tech!

            If you don't know about ice teach, you should. These rotors use different types of metal sandwiched together to dissipate heat way better. No more brake fade on the way down.

            Avg. ride time: 39m per week
            • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

            Best Rotors

            • Familiarity: I've put it through the wringer

            Shimano IceTech are the best rotors on the market, especially if you are running Shimano brakes. the heat dispersing tech behind them ensure that your brakes run as needed throughout your ride even after long descents.

            Great price for a great rotor.

            • Familiarity: I've put it through the wringer

            Running these on two bikes right now. My hope rotors were much lighter but developed a shift no matter how tight I made the bolts. So I put these on because I remembered their mounting bolts and clips. No problems so far. Just work.

            great rotors

            • Familiarity: I've put it through the wringer

            Not the full ice tech rotors but a little cheaper, I am not a EWS pro racer or anything so I went with these because I have ran Ice Tech rotors and couldnt tell the difference. These are solid and of course shimano quality.

            Are you sure they aren't Ice Tech? It looks like it says it on the rotor in the product pic.

            they areent the full ice tech with the fancy extra fins that you get with the higher end shimano rotors

            Soo Icey!

            • Familiarity: I've put it through the wringer

            Shimano knows brakes, whether is calipers or rotors - they put out a great product. I've run XT for many years and in my opinion you cant beat it for the price. Their SLX is also a tremendous option. Simple, hassle free and perform at a top notch level!

            Silent Stoppers

            • Familiarity: I've put it through the wringer

            Unless you get water on them these things are silent. Ive ridden them in every condition and could not be happier with them.

            Great Rotor

            • Familiarity: I've put it through the wringer

            I've been using XT rotors for the past two seasons with XT Brakes. Bang for the buck it's the best Brake System I've used. They work great and are extremely reliable. Highly recommended.