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Thread: Iro btm bracket

  1. #1
    Senior Member nelzar13's Avatar
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    Iro btm bracket

    im in the market for a bottom bracket thats goin on a iro mark V. (doesnt need to be anything fancy)It will be matched up to a track hub spaced at 120 any one know the size btm bracket i need to get my once again perfect chain line?

  2. #2
    Cornucopia of Awesomeness baxtefer's Avatar
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    what crank?
    {o,o**
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    -"-"-

    O RLY?

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    bward1028
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    Quote Originally Posted by baxtefer View Post
    what crank?
    say, sugino 75s

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    That 110mm spindle is too long for 75's not to mention the wrong taper...you need a Sugino superlap BB. I think they're 107mm and ISO NOT JIS taper.

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    yo yo yo yo yo
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    109 symmetrical iso for 75s..

    see here for track cranks: http://www.businesscycles.com/tr-refspec.htm

    road cranks probably a 107 or 103 depending on chainstay clearance

  7. #7
    Senior Member nelzar13's Avatar
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    a set of purely gangster bullet proofs!
    lol

  8. #8
    fails just as quickly thequickfix's Avatar
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    It looks like this should give you the information you need.

    For a 42mm chainline, you could use a 111mm spindle with the ring on the inside of the spider. (someone check me on that?)

    For future reference, chainline measurements have everything to do with the type of cranks, bottom bracket and hubs. The frame is not a factor.
    Takin' the first bus out of Shell Town

  9. #9
    Senior Member nelzar13's Avatar
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    ahhh yes that quick fix that should hook me up i do believe thank you kind sir

  10. #10
    extra bitter kyselad's Avatar
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    I don't think 111mm is available in anything reasonable (Campy makes one, but fughedaboutit). A 109 or 113 should be close enough, assuming it's symmetrical.

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