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Thread: Has this ever happened to anyone?

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    Default Has this ever happened to anyone?

    As my other posts have hinted at, I'm building up a ticycles Steel Cross frame.

    Now the troubles begin:

    I had bought a 47 ring (130bcd) for use on a 105 outboard bb crankset that I have.

    After installing that crankset, the teeth hit the chainstays. That was even after installing a 5mm spacer between the bb and the frame...

    Then I tried an octalink compact crankset. Same thing. Teeth hit. 5mm spacer fixed the problem, but the NDS will need the spacer too because the crankarm hits the chainstay. I can move the DS crankarm enough with my hand to make it hit the chainstays, and that's with the spacer.

    What the heck am I missing? Should I be using an octalink bb for a triple? That might give me another CM.

    Could I even use a triple BB with a double crankset? I'm guessing that's going to wreak havoc on the chainline?

    Whatever works I suppose.

    Any ideas? I don't even understand what's going on....
     

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    Sounds strange. You're installing this ring in the outside position?
    As a double or single ring set up? The inner ring doesn't hit?

    A smaller outer ring should be no closer to the chainstay than a 53.
    Need a photo. Something is messed up.

    -g
     

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    Quote Originally Posted by GrantM View Post
    Sounds strange. You're installing this ring in the outside position?
    As a double or single ring set up? The inner ring doesn't hit?

    A smaller outer ring should be no closer to the chainstay than a 53.
    Need a photo. Something is messed up.

    -g
    The photo would show exactly this:

    There isn't enough clearance between the teeth of the inside rings in a 47/39 setup or the crankarms in some setups to clear the chainstays.

    I got the frame from a salonista, and here's what he said:

    had it built up as a single speed with road double cranks and 42-46 (I think, its been a bit) chain rings (in the outer position).


    When the frame was designed it was not uncommon to use MTB triples, set up either as compact doubles or as triples. It may have been designed for that? I'll send the builder a note and see what he says.


    I've never tried to run it with anything other then square taper (DA- can't recall the series) or Octalink (105/ Ult standard) cranks. I thought i had a double in there, but I'll have to to look (I have the cranks and BB in a box someplace, I'll go digging and see what I see).

    /end email.

    I'm guessing that a triple BB would fix the issue, hopefully anyway.
     

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    Is the frame designed for 130 or 135 mm rear hubs? Most cross bikes are probably 130 but some touring frames are designed for 135, so maybe some cross frames are too. This shouldn't be enough of a difference to cause the ring to hit the stay, but it might be a contributing factor.

    -Ray
     

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    Sounds like a job for an Octalink triple BB.
     

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    Quote Originally Posted by caleb View Post
    Sounds like a job for an Octalink triple BB.
    Would the triple fit the double cranks with nary an issue?
     

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    Quote Originally Posted by ridethecliche View Post
    Would the triple fit the double cranks with nary an issue?
    Octalink is Octalink. No issues.
     

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    Quote Originally Posted by caleb View Post
    Octalink is Octalink. No issues.
    Sounds good.

    I'll give the 1cm spacers between the frame and the BB a try and hope that works. If it doesn't (and possibly even if it does) I'll nab a triple octalink setup.
     

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