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Thread: Disc brakes

  1. #1
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    Disc brakes

    I would like to install mechanical disc brakes on my mountain bike.
    I would like to learn about the rotor sizes that would fit the bike.
    The fork is a 74 mm Manitou and the rear has a 51mm fitting.
    I am 6'-2 and 200 lbs.

  2. #2
    ballbuster
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    read the faq

    Quote Originally Posted by kevie
    I would like to install mechanical disc brakes on my mountain bike.
    I would like to learn about the rotor sizes that would fit the bike.
    The fork is a 74 mm Manitou and the rear has a 51mm fitting.
    I am 6'-2 and 200 lbs.
    ... at the top of the page

  3. #3
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    Any rotor size would fit as long as you have the right adapter to mount the caliper onto the fork/frame so the size itself is completely up to you. Most disk brake rotors come in 160mm, 180mm or 203mm, there are also non-metric sized such as 6", 7" & 8" although they are not exactly the same diameter a 7" adapter will work for a 180mm disk and visa versa. Some people choose to have different size rotor on front and back to accommodate for the way that they ride and the fact that the front brake will wear down faster due to the rider mass being pushed forward while braking. A friend of mine has a 203mm in front, and 180mm in back, that way the front provides more stopping power while the back acts as a good way to make minor adjustments while riding, plus it looks pretty neat. As far as the caliper adapters go, make sure you have the adapters that are the same brand as the calipers that way you won't have to (or might not have to) add any spacers to space the caliper properly. You probably don't want to use 160mm or 6" rotors because you are a heavier rider.

    Good luck!

  4. #4
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    You can't get 6" rotor if you have IS caliper

  5. #5
    ballbuster
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    oreely?

    Quote Originally Posted by vk45de
    You can't get 6" rotor if you have IS caliper


    I guess you meant you can't get a 140mm for the front. You can for the rear.

    From MC29er


    From Fantom29er


    From Fantom29er

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