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Your cart is empty.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.
Customer
Reviewed in the United States on November 14, 2024
No noise, low heat no more spoke broken. Great stopping power
B. Hu
Reviewed in the United States on October 23, 2023
Does require a tool to install that you can also buy on Amazon. Light weight, will buy whenever necessary. Fits my 2022 S-Works Specialized Tarmac
J. Shen
Reviewed in the United States on March 6, 2022
the best disc brake for road, even compared with Dura Ace disc; very stable, dissipating heat very well, better than Campy AFS rotors and Dura Ace one
Craig A.
Reviewed in the United States on January 6, 2022
Dealt with the previous SM-RT900 rotors for about a year with constant overheating resulting in squealing and poor braking. These perform much better and don't seem to overheat. Not surprising that these are now the standard issue for the latest 9200 series Dura-Ace groupset. Only issue was that the Centerlocks are different to the older ones and need a different tool to torque them. I bought a Park Tool BBT-69.2 and it worked great using a 3/8 to 1/2" adapter on my torque wrench (the BBT-69.2 takes 3/8 square drive). Using them with K04Ti pads which seems to be an excellent combination.
Johanna
Reviewed in the United States on September 28, 2021
Outstanding braking performance super light and no issues with overheating. Shimano is by far the best option for brake rotors other brands like Sram are horrible . Highly recommend!
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