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  1. #1
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    Fitting modern 105 octalink bottom bracket on 80's road bike?

    Hi All,

    Plumbing for some insider knowledge here... I have a mid-80's Specialized Allez road bike with a 68mm bottom bracket. I'm planning on upgrading the cranks and saw jensenusa.com have on offer $100 ultegra 39/53. Of course, the spindle required is octalink, so I'd have to replace my bottom bracket. I see no reason why that'd be a problem, but wanted to confirm that before shelling out around $150...

    thanks!!!

    -morgan
    Los Angeles

  2. #2
    Sometimes knows stuff. rmfnla's Avatar
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    As long as you know the threading (and it sounds as if you do) it should work just fine.

    Remember, 109.5mm for double, 118 for triple.
    Today, I believe my jurisdiction ends here...

  3. #3
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    Thanks!

    I suspect the threading is English... 1980's specialized *must be* english, right?! I posted to the specialized rider support forum on their website, anyway.

    -morgan

  4. #4
    Senior Member sydney's Avatar
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    Quote Originally Posted by mbeeby
    Thanks!

    I suspect the threading is English... 1980's specialized *must be* english, right?!

    -morgan
    Yeah.

  5. #5
    Senior Curmudgeon
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    Been there - done that - works like a charm! Just measure the width of the BB housing before you order the new BB - most are 68, a few are 70.

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