Looking for a 34t 4 bolt 104mm chainring- Mtbr.com
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  1. #1
    Rollin' a fatty Moderator
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    Looking for a 34t 4 bolt 104mm chainring

    Does anyone knows were I can get one?

    After re-building my SS had to install a 20t cog w 32t ring (only one available) in order to remove the tensioner, I tried 32x18 with a half-link with no luck so I'm using 32x20 for now.

    Will the 34x18 solve the tension issue and still let me climb as the 32x18 did? Climbing is my only concern because I can pedal it on the flats.

  2. #2
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    Ring and tension

    Salsa Cycles probably makes that size - they seem to have a wide variety of BCDs and tooth counts. I suggest the unramped style - you don't need shift points for singlespeeding and its cheaper, too. Try AEBike once they get their website up.

    The change in tooth counts won't help your tension issue. If I understand it correctly, this looks like the rule of 4; adding 2 teeth up front and taking away 2 teeth in back means no net change in chain length. Your desire to switch from 32:20 to 34:18 will increase the gear ratio, but it will leave the tension problem unsolved.

    FWIW, I think 34:18 is a more useful ratio (1.9:1, 49.1 gear inches) than 32:20 (1.6:1, 41.6"). The 32:20 seems overly low (good for steep and/or extended climbing, but a bummer on the flats and descents). I guess it depends on you and the terrain you ride. I'm a slow moving Clydesdale and I found 34:20 to be a comfortable climbing ratio (1.7:1, 44.2"), though I spun a bit on the flats. If you find a 34t ring, you might want to try it with the 20t cog. It may also be magic for chain tension (with or without the half-link).

    Good luck.

  3. #3
    Lazy People Suck
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    Quote Originally Posted by DiRt DeViL
    Does anyone knows were I can get one?

    After re-building my SS had to install a 20t cog w 32t ring (only one available) in order to remove the tensioner, I tried 32x18 with a half-link with no luck so I'm using 32x20 for now.

    Will the 34x18 solve the tension issue and still let me climb as the 32x18 did? Climbing is my only concern because I can pedal it on the flats.
    I second the Salsa chainring. They are cheap and look nicely finished and come in an unramped ring. When trying to change cogs to keep the chain tension, things should work fine if you move in multiples of 4 (2 if you have a half link), so 34x18 should work fine if 32x20 did. So should 32x16 if you want a 2:1 ration, but you will have to remove a link.
    "Son, The world needs ditchdiggers, too"-Ted Knight, Caddyshack

  4. #4
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    I get it now...

    Fett's right - and I misread your post. I thought your were having tension issues with 32:20, but you aren't. If you have good chain tension with your current 32:20 setup, you should have equally good chain tension with 34:18 (+2, -2). Good work - a tensionerless gear combo is nice to find.

    AZB

  5. #5
    Rollin' a fatty Moderator
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    Is this the ring? SALSA Chainring 104/34t4-bolt Black 7075.

  6. #6
    Just Ride!
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    Quote Originally Posted by DiRt DeViL
    Is this the ring? SALSA Chainring 104/34t4-bolt Black 7075.
    I run a Salsa ring on my rig, very nice for the price.
    http://www.bikeman.com/miva/merchant...COMPCR104SALSA

  7. #7
    Do It Yourself
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    You can get a TruVativ SS or Black Spire Dual Slalom ring from Webcyclery for $30. Both rings are single speed specific with no shift ramps or pins. Out of the two, I would probably opt for the Black Spire.

    http://www.webcyclery.com/.docs/prod...t_details.html

  8. #8
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    Will TruVativ or Black Spire fit on a RF Prodigy crankset?

  9. #9
    KgB
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    Second the Blackspire

    Quote Originally Posted by Homebrew
    You can get a TruVativ SS or Black Spire Dual Slalom ring from Webcyclery for $30. Both rings are single speed specific with no shift ramps or pins. Out of the two, I would probably opt for the Black Spire.

    http://www.webcyclery.com/.docs/prod...t_details.html
    I don't know if it will resolve your issues though.
    I've been inside too long.

  10. #10
    Do It Yourself
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    Quote Originally Posted by DiRt DeViL
    Will TruVativ or Black Spire fit on a RF Prodigy crankset?
    Yes, both rings are available in 4 arm compact 104/64 BCD. I'm pretty sure the Prodigy is made by Truvativ in Taiwan. Prodigy is basically same as Truvativ FireX.

    I will add that if you can find a deal on the Salsa with no ramps and pins and it's cheaper, go with that.

  11. #11
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    Quote Originally Posted by Fett
    I second the Salsa chainring. They are cheap and look nicely finished and come in an unramped ring. When trying to change cogs to keep the chain tension, things should work fine if you move in multiples of 4 (2 if you have a half link), so 34x18 should work fine if 32x20 did. So should 32x16 if you want a 2:1 ration, but you will have to remove a link.
    I am currently running that verry ring. I bought it at REI, and have seen it on line as well. It is unramped, and works very well.

    Good luck.

  12. #12
    Rollin' a fatty Moderator
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    Got the Salsa on aebike.com for under $20.

    Thanks for the replies!

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