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Thread: Who makes. . .

  1. #1
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    Who makes. . .

    a 40 tooth 104mm bolt diameter ramped and pinned chainring. I want to make my bike a 2x9 and really would like to have this ring. Anyone know of a manufacturer?

    TIA

  2. #2
    Your bike is incorrigible
    Reputation: Guyechka's Avatar
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    Try this:

    http://www.blackspire.com/qs/product/83/5948/263222/0/0

    I used one of their 36 tooth rings as the small ring on a 2X8 set up. I honestly couldn't tell any difference in shifting. They're fairly cheap, too.

  3. #3
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    Reputation: ignazjr's Avatar
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    Guyechka, looks like that's not available in 104bcd. I just checked all my sources. The only 40t 104bcd rings I found were all flat rings (ie no ramps or pins).

    Stumpyiliz, if you have to have a 40t, a flat ring wont be the worst thing in the world. You could also probably home modify a flat 40 to shift a little better.
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  4. #4
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    Specialites T.A.

    http://www.starbike.com/php/product_...ng=en&pid=3185

    Expensive, super-light, and wear quickly.

  5. #5
    Your bike is incorrigible
    Reputation: Guyechka's Avatar
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    Quote Originally Posted by ignazjr
    Guyechka, looks like that's not available in 104bcd. I just checked all my sources. The only 40t 104bcd rings I found were all flat rings (ie no ramps or pins).

    Stumpyiliz, if you have to have a 40t, a flat ring wont be the worst thing in the world. You could also probably home modify a flat 40 to shift a little better.
    Actually, the one that I had was totally flat, but it made very little difference. I guess that's what I was trying to explain in the previous post. It shouldn't be as big a deal on a 2X9. It would make a lot more difference on a middle ring on a three ring crank. I think that Blackspire make some good products that are reliable and cheap.

  6. #6
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    Black Spire will be making one in the late spring. I'm going with a 22/38 combo for now. Thanks guys

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