Disc caliper brakes slow the bike by converting the speed and energy of the bicycle into heat. The system can generate significant heat from slowing the wheel and bike. Allow rotor and caliper to cool before touching or servicing.
The rotor diameter may vary between models and brands. Common rotor diameter sizes are 145mm, 152mm, 160mm, 185mm, and 203mm. The brake caliper, bike frame, and rotor diameter must be compatible.
The rotor or disc of the disc brake system secures to a disc-specific hub. The common system uses six bolts. Many brands use rotor bolts requiring the use of a 12-point star shaped driver such as the T25 Torx driver. A mild thread locker is recommended on the bolts. Secure rotor bolts to manufacturer’s torque specifications, typically between 40 and 60 inch-pounds.
The rotor and brake pads should be kept clean of oils and grease. If pads become contaminated, it is best to replace them. When cleaning the rotors or washing the bike, remove wheel and remove pads from bike. Use isopropyl alcohol or similar solvent when cleaning rotor surface of dirt or film. Do not use a solvent or cleaner that contains oils or leaves an oily residue.
3. Clean hub and new disc with isopropyl alcohol. Ensure that the hub threads and hub mounting surface are free of dirt and grit.
4. Place the disc on the hub mounting surface with the markings facing outward from the spokes. Ensure the arrow the disc is pointing in the direction of forward wheel rotation.
5. Install all 6bolts and snug evenly.
6. Tighten the disc screws (×6) in a star pattern to 6 Nm.
Caution: Do not over tighten the disc screws, to prevent damage to the threads, disc or screws.
7. Reinstall the wheel.
8. Spin the wheel to ensure that the disc is not rubbing against the brake pads. If the disc rubs, re-align the caliper. Refer to the Brake Installation and Set-up instructions, as needed.
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