How do you work out brake rotor size for replacement ?

bilabonic
bilabonic Posts: 299
edited December 2010 in MTB beginners
Hi

How do you measure your rotors if wanting to replace them ?

Cheers
Specialized Epic FSR Carbon Comp

Comments

  • nicklouse
    nicklouse Posts: 50,675
    see what it says on them.

    or use a rule.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • welshkev
    welshkev Posts: 9,690
    measure the diameter? i think that's how it's done :D
  • mattv
    mattv Posts: 992
    It says on all rotors on the outside of the rotor, usually somewhere enar the centre but not always. OR you can measure the diameter of the disc. Look and see how it is held onto the hub, either with 6 bolts or with a spline and lockring like on a cassette. If it has bolts, it is a 6-bolt, if it has a lockring, then it is a centre-lock disc from shimano.
  • shm_uk
    shm_uk Posts: 683
    1. Calculate the area of the rotor
    2. Divide this by pi
    3. Then take the square root of this
    4. Finally, double the answer to 3.

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