Best current price£74.99from Leisure Lakes Bikes
Shopping.co.uk recommended and popular offers
Leisure Lakes Bikes£74.99Visit shop Shimano XTR RT-MT900 Disc Rotor with Internal Lockring 203mm
Visit shop2 offers from £74.99
View price history by clicking the chart icon.
The Shimano XTR RT-MT900 is a high-performance disc rotor designed for serious mountain bikers and gravity riders who demand consistent stopping power and thermal management. It offers the key benefit of advanced heat dissipation through a sophisticated 3-layer construction, ensuring reliable braking during intense descents and under heavy loads. However, potential users should note that the Center Lock mounting system requires specific tools and compatible hubs, which may not be universal for all older or budget-focused bike setups.
| Series | XTR |
|---|---|
| Model Part Number | RTMT900LM |
| Brand | Shimano |
No, this rotor is exclusively designed for the Shimano Center Lock system.
You must check your frame and fork manufacturer's specifications to ensure they support a 203mm rotor size.
The Freeza design uses the alloy core to dissipate heat significantly faster than standard steel rotors, reducing brake fade.
While it works with standard pads, it is optimized for use with Shimano Ice Tech pads for the best performance.
Check the thickness of the braking surface periodically; if it falls below the minimum thickness marked on the rotor, it should be replaced.
Clean the rotor with isopropyl alcohol and check if the brake pads have become contaminated with oil or grease.
Verify that the Center Lock lockring is tightened to the recommended torque specifications.
Ensure the rotor is perfectly true; if warped, use a rotor truing tool or replace the unit.
The RT-MT900 uses the Shimano Center Lock standard. To install, align the rotor with the splines on your hub, then use a standard external bottom bracket tool to tighten the internal lockring to the manufacturer's specified torque. Ensure the lockring is seated correctly to prevent play.
Keep the braking surface clean by wiping it with 90% isopropyl alcohol periodically to remove surface glaze or oily residues. Avoid using degreasers on the rotor, as they can leave harmful contaminants that cause noise and reduced stopping power.
