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Leisure Lakes Bikes£64.99Visit shop Shimano RT-MT800 Steps Disc Rotor with Lockring and Magnet Ice Tech FREEZA CentreLock 203mm Silver/Black
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The Shimano RT-MT800 Ice Tech FREEZA 203mm rotor is an essential upgrade for e-bike riders who require reliable heat management and consistent braking performance under demanding conditions. Designed specifically for bikes equipped with Shimano STEPS systems, it features an integrated speed sensor magnet and advanced heat-dissipating technology to ensure safety during long descents; however, users must verify that their hub is compatible with the Center Lock mounting standard before purchase.
| Series | Ice Tech FREEZA |
|---|---|
| Model Part Number | RTMT800LM |
| Brand | Shimano |
Yes, but you will have an unused magnet on the rotor which adds minor weight.
No, you will need a standard external or internal splined bottom bracket tool to secure the lockring.
Shimano Ice Tech pads are highly recommended to take full advantage of the heat-dissipating properties of this rotor.
No, this is exclusively a Center Lock rotor. You would need an adapter to use it on 6-bolt hubs, though a direct Center Lock hub is preferred for rigidity.
Check the thickness periodically; if it measures below the manufacturer's specified minimum thickness, it should be replaced.
Clean the rotor surface with isopropyl alcohol and perform a proper bedding-in process for your brake pads.
Check that the rotor is seated fully on the hub splines and that the magnet is correctly aligned with the frame-mounted speed sensor.
Ensure the wheel is properly seated in the dropouts and perform a caliper alignment by loosening the mounting bolts, squeezing the lever, and retightening.
Installation requires a standard Shimano external or internal splined bottom bracket/lockring tool. Ensure the lockring is tightened to the manufacturer's specified torque rating (usually 40 Nm). Because this is a Center Lock rotor, there is no need for alignment washers or complex adjustments typical of 6-bolt setups.
Regarding care, avoid using harsh chemicals or degreasers on the braking surface. If the rotor becomes contaminated with chain lubricant or oil, clean it thoroughly with professional-grade disc brake cleaner and a clean rag. Periodically check the rotor for signs of warping or excessive thinning; if the track thickness drops below the specified minimum, the rotor must be replaced to maintain safe stopping performance.
