Convert '07 XTR to 203mm- Mtbr.com
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  1. #1
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    Convert '07 XTR to 203mm

    Is there a way to convert '07 XTR brake caliper (by adding a bracket or other means) to work with 203mm disc?

  2. #2
    Meh.
    Reputation: XSL_WiLL's Avatar
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    Yes, via adapters for the appropriate size difference and mounts.

  3. #3
    Nightriding rules SuperModerator
    Reputation: crisillo's Avatar
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    As Will said sure you can, here's the adaptor possibilities:

    Front caliper:
    SM-MA-F203P/S: Postmount caliper IS fork
    SM-MA-F203P/P: Postmount caliper Postmount fork
    SM-MA-F203S/P: IS caliper Postmount fork
    SM-MA-F203S/S: IS caliper IS fork

    Rear caliper:
    SM-MA-R203P/S: postmount caliper
    SM-MA-R203S/S: IS caliper

  4. #4
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    Thanks. Are these available from Shimano or other suppliers?

    I am buying the XTR brake caliper (160mm) for my single speed which I may transplant it onto my tandem when I go on a 3,000 miles bike tour with my wife. According to many kind advices of this board, I would be better off with converting it to 203mm on the tandem.

  5. #5
    -> SickLines.com <-
    Reputation: mtb_biker's Avatar
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    You should be able to get them from your local bike shop. The rear caliper will need an IS adapter, your front will need postmount to IS , or IS to IS depending on what fork you have.

  6. #6
    Nightriding rules SuperModerator
    Reputation: crisillo's Avatar
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    Those are the shimano models, but you should be able to use adapter from other brands too.

  7. #7
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    Can the SM-MA-F203S/S and SM-MA-R203S/S adapters also be used to convert old IS-51 mounting M755 XTs?

  8. #8
    -> SickLines.com <-
    Reputation: mtb_biker's Avatar
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    yes you can get adapters to convert the m755's to accept 8". There are two different styles of "SM-MA-F203S/S" on the front though so be careful you get the right one.

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