Shimano XTR/Dura-Ace Centerlock Disc Rotor

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
Item #SHI00LJ