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  1. #1
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    ? about GOOD Chainrings

    I just got into the fixed gear craze, I've been riding a Schwinn Paramount and now a Trek T1, I'll put a review later.

    It comes standard with a Stronglight CT2 49T 130mm chainring and a 15T cog. I want a 42/15 and 42/17 combo depending on the riding that I do, 49T is too tall, I'm practically cruising downhill.

    I want a comparable or better chainring, in quality. I could only find the Stronglight in Europe, I think they are french, correct? Anyone know a dealer in the US, or a comparable chainring in black

    Thanks,
    Oscar

  2. #2
    Senior Member
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    get a 144 drivetrain

  3. #3
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    business cycles can get you the stronglight, i think. you could just get a 17 and a 19 cog, though; you may not be able to get a 42 in a 144bcd stronglight ring.

  4. #4
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    why do you say to go with the 144? For the type of riding that I do, I want a high 60 to low 70 gear inches.

  5. #5
    Junior Member Jazz's Avatar
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    I've got the same bike, with the same stock chainring but got rid of the 15T cog straight away since it was too small (whats up with that Trek, 1/8 chainring and chain but 3/32 cog??) and replaced it with a EAI 18T. It's perfect for me now, and no problem up or down. Chain and chainring are still doing good and can't see why I should replace them.

    The bigger the chainring, the more street-rezpekkt u get!

  6. #6
    Utilitarian Boy Gyeswho's Avatar
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    Quote Originally Posted by kemfizix View Post
    why do you say to go with the 144? For the type of riding that I do, I want a high 60 to low 70 gear inches.
    he meant a 144bcd. Basically chainring bolts have various bolt diameters. 144bcd is common for track chainrigs because they are usually the ones with 1/8 thick chainrings and these are very easy to find when you want to keep you drive chain at 1/8th. When you have a different bcd it is common that it is going to be 3/32nd thickness which is usually a road chainring.
    This man explain better than I do:
    http://sheldonbrown.com/fixed.html#chain

  7. #7
    Sir Fallalot wroomwroomoops's Avatar
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    My experience has confirmed time and again: steel chainrings will outlast aluminum chainrings of the same width several times.

    7075-(T6) aluminum chainrings will outlive 6061-(T6) aluminum chainrings 2 to 1, due to the much higher hardness of 7075 vs 6061 (at parity of temper).

    Finally, due to the shape of the teeth which in case of 3/32" chainrings are tapering down very quickly to a tiny point, vs. the ones on 1/8" which maintain a much more "full-figured" shape, 1/8" chainrings will last about 3 times longer than 3/32" at parity of material and temper.


    The worst chainrings I have ever used were the 3/32" Rocket Rings. Avoid like plague. The best aluminum chainrings I have ever used were 1/8" suginos and 3/32" Salsa chainrings (I wish they had them in 1/8"). The Surly stainless steel chainring I bought a couple of years ago still looks like new - practically unblemished.
    Last edited by wroomwroomoops; 03-06-08 at 04:53 PM.

  8. #8
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    Quote Originally Posted by Gyeswho View Post
    he meant a 144bcd. Basically chainring bolts have various bolt diameters. 144bcd is common for track chainrigs because they are usually the ones with 1/8 thick chainrings and these are very easy to find when you want to keep you drive chain at 1/8th. When you have a different bcd it is common that it is going to be 3/32nd thickness which is usually a road chainring.
    This man explain better than I do:
    http://sheldonbrown.com/fixed.html#chain
    That's not what it means - the bolts aren't a different diameter, the bolt circle is.

  9. #9
    Utilitarian Boy Gyeswho's Avatar
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    Quote Originally Posted by tmanAg08 View Post
    That's not what it means - the bolts aren't a different diameter, the bolt circle is.
    ooops my mistake, but you knew what I was getting at

  10. #10
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    OP, if you mean 130mm as the bolt circle diameter (bcd) then you should be able to get a 42t stronglight. otherwise the sugino zen messenger is 1/8" and 130bcd and is a nice ring.

    i still maintain that it's more versatile to get a 18t cog than to replace a perfectly good ring, especially since it's mentioned above that it's 3/32". 49t gives you more skid patches, if that's important, and cogs are cheaper than rings.

  11. #11
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    I got a 17t EAI cog which puts me at 75 inches. It's really nice and I can keep a good pace doing hills. Thanks everyone

  12. #12
    matters cryptozoological
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    it gives me a nice, warm, fuzzy feeling whenever i see this forum being used in constructive ways like this.

    ...anyways, glad to hear you got it fixed kemfizix. keep riding

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