SM-RT66 and SM-RT86 use six mounting bolts. SM-RT70, RT-MT900 and RT-CL900 use the splined Center Lock system with a lockring. Match the rotor attachment to your wheel hub; the brake brand alone does not identify the mounting type.
Read the diameter marked on your existing rotor and check the sizes approved for your brake, frame and fork. Match the specified rotor thickness too. Changing diameter may require a different caliper adapter; choose the exact size on the product page before ordering.
No. Rotor fit also depends on the caliper, pad contact shape and approved pad compound. Check the exact brake and rotor combination rather than relying on the Shimano name or hub fitting alone. Our Shimano identification guide helps you identify your brake pads.
Center Lock rotors need a lockring compatible with the hub, axle and rotor. Internal and external tool fittings use different tools, and axle clearance matters. Six-bolt rotors use mounting bolts instead. Check the selected product to see which hardware is included.
Rotor selection help
Send us your brake model, rotor markings and a photo of the hub mounting. We can help you check the rotor size, pad compatibility and mounting hardware before you order.
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