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Road BB86-> MTB Cranks Questions?

Discussion in 'Road & Cyclocross' started by Dhracer3, Aug 1, 2013.

  1. Dhracer3

    Dhracer3 Monkey

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    Im building up a CX bike that has the BB86 bottom bracket setup.

    I'm an MTB racer and have many MTB cranks with chain rings.
    I know the standard BB86 is setup for Shimano and runs their cranksets and from what I have gathered if I wanted to run SRAM/Truvativ Cranks I would need to get the GXP BB86/91 bottom bracket setup.

    Anyways I have a Truvativ MTB Stylo crankset which I had to space the stock BB86 non-drive side out with extra spacers to make it work. I really don't want to run it long in this setup because I think it may damage the frame after awhile so I want to get this fixed properly.

    From what I can gather is that the MTB crank axle length are a little longer than the Road crank axles.

    I want to find out if buying the BB86/91 SRAM GXP BB would allow me to run my MTB crankset on the BB86 frameset instead of me buying a whole new crankset and BB for the bike.

    Has anyone out there gone through this same scenario? trying to run MTB cranks with BB86 setup.
    I think I'm going to have to get the SRAM GXP BB and just use some spacer on the axle to fill in.
     
    #1 -   Aug 1, 2013

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  2. SuspectDevice

    SuspectDevice Turbo Monkey

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    You aren't going to have chainring clearance with MTB stuff, unfortunately.
     
    #2 -   Aug 2, 2013
  3. Dhracer3

    Dhracer3 Monkey

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    I have the tabs for the small ring cut off on my cranks so that is does clear. I'm wanting to run just a single ring in front but need to figure out a way to correct the bottom bracket.
     
    #3 -   Aug 7, 2013