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Thread: 42T Chainring

  1. #1
    Senior Member Frankfast's Avatar
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    42T Chainring

    Looking for a nice looking 42T Chainring 130BCD. Don't want 110/130. Know where I can find one?
    The trick to life is to keep moving.

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    7-speed doomsday prepper ThermionicScott's Avatar
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    42T used to be a really common inner chainring for road bikes, so there are plenty of used ones out there in good shape, too.
    Quote Originally Posted by chandltp View Post
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    Senior Member Frankfast's Avatar
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    Quote Originally Posted by ThermionicScott View Post
    42T used to be a really common inner chainring for road bikes, so there are plenty of used ones out there in good shape, too.
    OK to use a chainring from a double or triple for fixed gear?
    The trick to life is to keep moving.

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    cheese connoisseur Mumonkan's Avatar
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    Quote Originally Posted by Frankfast View Post
    OK to use a chainring from a double or triple for fixed gear?
    Yup, just make sure you use single speed chainring bolts
    ride bikes, eat food. the circle of life.

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    Senior Member Frankfast's Avatar
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    Hey guys thanks. I think I'm going with the Sugino.
    The trick to life is to keep moving.

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    I'm also looking to get a 42T chainring replacement for my wife's Torker. I've been having trouble finding 1/8" chainrings, which my friend who is helping with this said is important, the couple that I have found are all $50+, is that the range I should expect to pay (vs. ~$30 for a 3/32")?

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    for dynamic hybrid logics prooftheory's Avatar
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    Quote Originally Posted by dmcg View Post
    I'm also looking to get a 42T chainring replacement for my wife's Torker. I've been having trouble finding 1/8" chainrings, which my friend who is helping with this said is important, the couple that I have found are all $50+, is that the range I should expect to pay (vs. ~$30 for a 3/32")?
    It is not important to have a 1/8" chainring. You can run a 1/8" chain on a 3/32" chainring without any problems. (But not the other way around.)

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    Meta-Whiner gregjones's Avatar
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    Quote Originally Posted by prooftheory View Post
    It is not important to have a 1/8" chainring. You can run a 1/8" chain on a 3/32" chainring without any problems. (But not the other way around.)
    +1

    You're wife would have to be quite the bike monster to do any damage because of a missing thirty-second of an inch.
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  11. #11
    Meta-Whiner gregjones's Avatar
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    I have several of these FSA rings and haven't had any problems.
    "Lower sodium" only means that you can put mom in front of your cardiologist on speed dial.
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    Thanks for the info, I thought he had said that if I got a 3/32" that it would wear quicker with a 1/8" chain, but maybe I misunderstood. How about inner, outer, or center?

  13. #13
    Senior Member Huffandstuff's Avatar
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    Quote Originally Posted by dmcg View Post
    Thanks for the info, I thought he had said that if I got a 3/32" that it would wear quicker with a 1/8" chain, but maybe I misunderstood. How about inner, outer, or center?
    It will wear "faster" than a 1/8th just due to less metal contact but it's so minimal it's not worth worrying about.

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    Quote Originally Posted by Huffandstuff View Post
    It will wear "faster" than a 1/8th just due to less metal contact but it's so minimal it's not worth worrying about.
    So, does that mean the only thing I have to worry about when getting a replacement is # of teeth and BCD? Sorry, still a bit new at this and confused about all the options.

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    for dynamic hybrid logics prooftheory's Avatar
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    Quote Originally Posted by dmcg View Post
    So, does that mean the only thing I have to worry about when getting a replacement is # of teeth and BCD? Sorry, still a bit new at this and confused about all the options.
    Pretty much. Here is an article about chainlines to answer your other question about whether it should be inner or outer etc.

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    Thanks for the link. I don't see an exact matchup there which I think is the same as the OP (42T, 130mm BCD), but it gives me a better understanding of what certain terminology means and what is going on. So I guess the other thing I want to look out for is not to get a ramped and pinned chainring, and I also want to make sure that the teeth are symmetrical (where as for geared bikes they won't be)?

    I'd been wanting to buy via Amazon since I have some credit there right now, but I'm thinking it might just be safer to buy the FSA that GregJones linked to or one of the others linked earlier in the thread.

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