Question on brake caliper adapter for the Bluto- Mtbr.com
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  1. #1
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    We the people ... Question on brake caliper adapter for the Bluto

    So I just bought a Bluto and am installing my XT M8000 brake caliper on it. As I am using a 180mm rotor on my DT Swiss hub, I obviously need an adapter to lift up the caliper a bit. I am using the regular XT / XTR adapter (one end is about 10mm and the other end is about 5mm) but it seems that the caliper is just not sitting right. What am I doing wrong?

    I have searched the Internet and could not find any pictures of a bluto with the brake caliper.

  2. #2
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    Is that the same set up as the Nutrail Race?

  3. #3
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    I have a 203mm adapter coming from China. I'll let you know if there's something not right about it

  4. #4
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    The correct adaptor should work (+20mm). What is the part number of the adaptor are you using? Is it the correct way up?

    Photo of Bluto + caliper:

    Question on brake caliper adapter for the Bluto-dsc_4534_zps9eyrmixa.jpg

    (Note that this is actually the wrong adaptor - it's +23mm. The correct one looks the same, but I don't have a photo Also, I changed to Shimano Deore brakes when the pads in the Avids wore out - they fit exactly the same as that photo.)

  5. #5
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    Quote Originally Posted by paxfobiscum View Post
    . What am I doing wrong?
    Are you sure it's an adapter for 180mm front and not rear? They are not the same.

  6. #6
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    The Shimano F180P/2P adapter works fine on my Bluto with XT M8000.

  7. #7
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    Quote Originally Posted by kidd View Post
    I have a 203mm adapter coming from China. I'll let you know if there's something not right about it
    When it fitted could you post a pic- as I'm interested in this mod

    many thanks

  8. #8
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    The adapter worked out better than the camera on my phone. I can only take selfies.

  9. #9
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    A 203mm adaptor (presumably 180 to 203, so +23mm, rather than 160 to 203 which would miss half of a 180mm disc!) is not ideal for a 180mm disc, as it makes the pads run off the edge of the disc by ~1mm. It is what I have in the photo I posted above - it was sold to me as a +20mm adaptor (when I figured out why the pads were not lined up with the disc I returned it).

    To run a 180mm disc with Blutos, you need a 160 to 180mm (i.e +20mm) post to post adaptor. Shimano do two types: one with two bolts that mount both the caliper and the adaptor, and one with four bolts where the caliper and the adaptor are mounted separately:

    2 bolt: SM-MA-F180-P/P2

    Question on brake caliper adapter for the Bluto-163877_1504120.jpg

    4 bolt: SM-MA-F180-P/P

    Question on brake caliper adapter for the Bluto-523525d1267219278-180mm-shimano-disc-brake-adaptor-fsa-afterburner-386-17301.jpg

    (Similar parts are available from others)

    I'm using the SM-MA-F180-P/P2 with a 180mm rotor and the Bluto, and it works just fine.

  10. #10
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    Pic of my 203mm setup. Some juicy 7s lined up perfect with cone washers top and bottom. These XOs only line up with no washers on bottom.

  11. #11
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    Quote Originally Posted by Misterg View Post
    A 203mm adaptor (presumably 180 to 203, so +23mm, rather than 160 to 203 which would miss half of a 180mm disc!) is not ideal for a 180mm disc, as it makes the pads run off the edge of the disc by ~1mm. It is what I have in the photo I posted above - it was sold to me as a +20mm adaptor (when I figured out why the pads were not lined up with the disc I returned it).

    To run a 180mm disc with Blutos, you need a 160 to 180mm (i.e +20mm) post to post adaptor. Shimano do two types: one with two bolts that mount both the caliper and the adaptor, and one with four bolts where the caliper and the adaptor are mounted separately:

    2 bolt: SM-MA-F180-P/P2

    Click image for larger version. 

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    4 bolt: SM-MA-F180-P/P

    Click image for larger version. 

Name:	523525d1267219278-180mm-shimano-disc-brake-adaptor-fsa-afterburner-386-17301.jpg 
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    (Similar parts are available from others)

    I'm using the SM-MA-F180-P/P2 with a 180mm rotor and the Bluto, and it works just fine.
    Thanks!

  12. #12
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    And here's a close up of the mod on my Nutrail

    Name:  disc conversion.jpg
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