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ShimanoXTR RT-MT900 Centerlock Disc Rotor

Sale $65.59 - $84.99

Item # SHI00LJ

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  • Gray/Black, 140mm ($79.99)
  • Gray/Black, 160mm ($79.99)
  • Gray/Black, 180mm ($84.99)
  • Gray/Black, 203mm ($84.99)
  • Grey, 180mm ($65.59)
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Item # SHI00LJ

XTR RT-MT900 Centerlock Disc Rotor

Designed to keep your braking system cool on long, demanding descents, the XTR RT-MT900 Centerlock Disc Rotor rapidly dissipates heat for more consistent braking performance in extreme conditions, as well as longer pad life and reduced brake fade. These rotors are optimized for the XTR M9100 and M9120 brakes, and feature a new design that improves cooling and decreases weight compared to the previous version of the XTR rotor, the RT-99.

Employing Shimano's Ice Technologies Freeza construction, these rotors use a 3-layer design consisting of two steel braking surfaces sandwiched over an aluminum core. This allows Shimano to take advantage of the high thermal conductivity of aluminum, whereas most companies simply use steel rotors. And thanks to a new heat dissipating paint on the exposed parts of the aluminum layer, the RT-MT900 rotors see their surface temperature cooled by up to 20-degrees Celsius compared the previous XTR RT-99 rotors. The 140mm and 160mm sizes are optimized for XC and focused on weight reduction, whereas the 180mm and 203mm rotors are made for aggressive trail and enduro with an emphasis on efficient cooling.

  • XTR rotor offering improved cooling and braking performance
  • 3-layer Freeza construction dissipates heat on long descents
  • Enjoy consistent performance, longer pad life, reduced brake fade
  • Surface temp cooled by up to 20-degrees Celsius vs. RT-99 rotors
  • 140mm and 160mm rotors see considerable weight savings for XC
  • 180m and 203mm are designed for aggressive trail and enduro
  • Shimano Centerlock attachment with lock ring included

Tech Specs
[core] aluminum, [braking surface] stainless steel, [lock ring] aluminum
Attachment Type
Shimano XTR M9100 and M9120 calipers, Shimano Ice-Tech brake pads
140mm, 160mm, 180mm, 203mm
Recommended Use
cross-country, enduro, trail
Manufacturer Warranty
3 years

Actual Weight

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

Have questions? Chat with a Gearhead



Gray/Black, 140mm
Gray/Black, 160mm
Gray/Black, 180mm
Gray/Black, 203mm
Grey, 180mm

Claimed Weight

Claimed weights are provided by the vendor.

Have questions? Chat with a Gearhead

[140mm] 90g, [160mm] 108g, [180mm] 133g, [203mm] 149g

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    What do you think about this product?



    Grey/black vs grey? Could you tell me the differences? From Shimano’s website I saw only one color. Super confused.

    I also have the same question. Come in BC... get your stuff together. My guess is that the Grey/Black is the XTR level RT-MT900, and Grey is the XT level RT-MT800


    Specs say these are compatible with Shimano Ice Tech pads. Are they compatible with ordinary pads, e.g. Kool Stop? Will be using with Paul Klampers.


    The XTR RT-MT900 Centerlock Disc Rotors are compatible with XTR M9000 SM-RT-99?????

    >Rating: 5


    I've put it through the wringer

    Using in place of DA rotors. Lighter, truer and better looking. Nothing not to like.


    Can you run these Rotors with the SLX calipers?

    >Rating: 4

    They look really nice!

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

    These rotors look sick. The contact ring is actually the normal silver, not grey like shown in the photo. The inner part is a nice gloss black.

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