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  1. #1
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    Ultegra Chain ring Compatability

    I am thinking of replacing my 53/39 with an 50/34 compact crank set. Is there any other chain rings that will work for the inner ring like a 30 or 28 tooth ring?. Would want it just to do hill climb races.

  2. #2
    Cranky Old Bastard
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    Quote Originally Posted by gpa357 View Post
    I am thinking of replacing my 53/39 with an 50/34 compact crank set. Is there any other chain rings that will work for the inner ring like a 30 or 28 tooth ring?. Would want it just to do hill climb races.
    Sorry, no. They can't make a ring that is smaller than the bolt circle.

    Triple crankset has smaller rings.
    "When you know absolutely nothing, anyone who knows 1% more than nothing sounds like an expert."

  3. #3
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    There are solutions out there, but they won't work with a compact. You can find old 94 bcd's or current MTB doubles that will go that low but they all have compromises.

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