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  • Shimano - XTR SM-RT99 CenterLock Disc Rotor - SM-RT99

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  • Shimano - XTR SM-RT99 CenterLock Disc Rotor - SM-RT99

Shimano XTR SM-RT99 CenterLock Disc Rotor

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    • SM-RT99, 160mm
      sale $49.97
    • SM-RT99, 180mm
      sale $49.95
    • SM-RT99, 203mm
      sale $59.95
    • SM-RT99, 140mm
      sale $53.99

    5 Reviews


    Ice cold.

    Heat buildup is the mortal enemy of disc brake systems, and Shimano has pulled out all the stops with the XTR SM-RT99 CenterLock Disc Rotor to keep the brake calipers cool. Its IceTech technology utilizes an aluminum core sandwiched between stainless steel braking tracks, resulting in a lighter rotor that sheds heat faster than standard all-steel rotors. Additionally, the wavy alloy inserts on the inside of the braking track serve as cooling fans to channel heat away instead of into the brake caliper. All this attention to heat dissipation boils down to more consistent braking power and more confidence on the trails than you'd have with non-IceTech rotors.

    Please note that the XTR SM-RT99 rotors are only compatible with CenterLock hubs, and they cannot be adapted to six-bolt hubs. If you need a Shimano IceTech rotor for six-bolt hubs, check out the SH-RT86 XT IceTech rotor.

    • A top-tier disc rotor for unrivaled stopping power
    • IceTech construction manages heat to maintain responsiveness
    • Cooling fins scrub heat while scrubbing speed
    • Temper's XTR speed with equally impressive braking
    • Item #SHI0666

    Tech Specs

    Attachment Type
    CenterLock hubs
    160 mm, 180 mm, 203 mm
    Recommended Use
    mountain bike
    Manufacturer Warranty
    3 years

    Tech Specs

    • Reviews
    • Q & A

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    • Familiarity: I've used it several times

    These are centerlock only rotors. Must have center lock hubs to run these rotors. The freeza technology mix with ice tech really keeps the heat down and braking power consistent. Help to not burn up rotors after a long descent.

    Stop on a Dime

    • Familiarity: I've put it through the wringer

    I put these on my Ibis Mojo 3 and have the Ibis 742 wheelset - you'll need hubs with centerlock. I wanted an aggressive short travel bike and bought a 203mm in front & a 180mm rotor in rear.


    - Lightweight

    - Cools fast

    - Stopping power is next to none

    - Easy to install and remove if need be, considerably easier than dealing with 6 bolt rotors


    - the 15mm (or 20mm) lockring does not come with the rotor. And like Geoff T noted below, they're a bit of a hassle to find. That said if you're lucky enough to have a good local bike shop, they're likely to have one.

    The bottom line is you can't beat these rotors. They're light and work great if you've got hubs with centerlock.

    Stop on a Dime

    best of the best

    • Familiarity: I've used it several times

    I had the icetech rt86 rotors that wouldn't stop squealing so when I upgraded my pads (truckerco semi-metallic organic) I switched out the rotors too the new rt99 and they are awesome. new setup doesn't make a sound and stopping power is definitely better. cant tell if its the pads or the rotors or both, but I like the upgrade to say the least

    Is the rt99 180mm heavier than rt98 180mm rotors?