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  1. #1
    Senior Member sjmartin's Avatar
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    Is it ok to use a 3/32 chain on a 1/8 cog?

    Are there any pro's or con's to using a 1/8 chain on a 1/8 cog?

  2. #2
    THE STUFFED Leukybear's Avatar
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    You can't use a 3/32 chain on 1/8 drive train parts; but you can the other way around... and to think you bought those reynolds SDVC66's just like how I did you would have a clue.....

    Anyways, when you have a matching chain and drive chain size, drive chain noise is most likely reduced.

  3. #3
    Veteran Racer TejanoTrackie's Avatar
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    3/32 chain cannot be used on a 1/8 cog or chainring.
    What, Me Worry? - Alfred E. Neuman

    Quote Originally Posted by Dcv View Post
    I'd like to think i have as much money as brains.

  4. #4
    Senior Member sjmartin's Avatar
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    The reason why I ask, and also the reason for my confusion is because of the following:

    I purchased the motobecane team track:
    http://www.bikesdirect.com/products/...team_track.htm

    on the details it specifies:
    Crank - Shimano Dura Ace 49T Aluminum Track ring (3/32 width)
    Chain - KMC Z410 (3/32 width)

    I assumed the cog was also 3/32 so i just purchased a chain whip to swap out cogs but it would not work. i returned it and i purchased a 1/8th chain whip and everything worked great.

    How can i determine what I have? the manufacturer's website says 3/32 but the cog seems to be 1/8th for sure.


    The website specifically says it is also a 3/32 chain on a 1/8th cog...

  5. #5
    Fresh Garbage hairnet's Avatar
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    Well, you probably want to get a new cog anyway since 49/15 on the streets is pretty damn high. You can always take a ruler and measure the width of the cog
    Quote Originally Posted by Scrodzilla View Post
    I'd rather ride a greasy bowling ball than one of those things.
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  6. #6
    THE STUFFED Leukybear's Avatar
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    You can visualize also it. Here let me help since I have 2 cogs right here on my desk as paper weights, 3/32 teeth are as thick as a penny & 1/8 is as think as 2 pennies stacked. Hope it helps.

  7. #7
    Senior Member sjmartin's Avatar
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    it's my track bike

  8. #8
    Senior Member sjmartin's Avatar
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    i measured the chain width that is current on my bike and it is exactly 1/4 of an inch wide. this ruler doesn't have cm. but equates to .63 cm. is that a 1/8 or 3/32 chain?

  9. #9
    Senior Member sjmartin's Avatar
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    Quote Originally Posted by Leukybear View Post
    You can visualize also it. Here let me help since I have 2 cogs right here on my desk as paper weights, 3/32 teeth are as thick as a penny & 1/8 is as think as 2 pennies stacked. Hope it helps.


    all signs point to 3/32, so confused why the first chain whip would not work, but a 1/8th chain whip works great...

  10. #10
    Senior Member dbwoi's Avatar
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    its quite easy to just eyeball it and figure out what size you have...google some pics of 1/8 and 3/32

  11. #11
    THE STUFFED Leukybear's Avatar
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    Quote Originally Posted by sjmartin View Post
    I meant the thickest part of the teeth considering teeth are tapered, that's 1/8.

  12. #12
    Senior Member sjmartin's Avatar
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    Thanks. I wonder why the website says 3/32 then. Made me buy all the wrong tools for it.

    Here is my chain:


  13. #13
    Knotty Guy Anthropy's Avatar
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    1cm = 2.54 inches so take 0.63/2.54 = 0.2480 inch

    1/8" = 0.125" * 2.54cm/inch = 0.3175 cm
    3/32" = 0.09375" * 2.54 cm/inch = 0.2381 cm


    Tom

  14. #14
    I Like to Bike youngandcurious's Avatar
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    1/8=4/32
    Quote Originally Posted by mikeetow View Post
    id ride it. after making it a fixed gear

  15. #15
    Senior Member sjmartin's Avatar
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    please excuse my density, but just to confirm from the pictures i posted i have a 1/8 cog and a 3/32 chain right? (this is what came natively with the purchased bike)

  16. #16
    Veteran Racer TejanoTrackie's Avatar
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    Quote Originally Posted by sjmartin View Post
    please excuse my density, but just to confirm from the pictures i posted i have a 1/8 cog and a 3/32 chain right? (this is what came natively with the purchased bike)
    ..
    Attached Images Attached Images
    What, Me Worry? - Alfred E. Neuman

    Quote Originally Posted by Dcv View Post
    I'd like to think i have as much money as brains.

  17. #17
    Fresh Garbage hairnet's Avatar
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    Quote Originally Posted by anthropy View Post
    1 inch = 2.54 cm
    .


    Ftfy
    Quote Originally Posted by Scrodzilla View Post
    I'd rather ride a greasy bowling ball than one of those things.
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  18. #18
    what? NO! arp415's Avatar
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    Oh Tom

  19. #19
    Senior Member sjmartin's Avatar
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    Quote Originally Posted by Anthropy View Post
    1cm = 2.54 inches so take 0.63/2.54 = 0.2480 inch

    1/8" = 0.125" * 2.54cm/inch = 0.3175 cm
    3/32" = 0.09375" * 2.54 cm/inch = 0.2381 cm


    Tom
    So I do indeed have a 3/32 chain on a 1/8th cog. Post #2 states that there is no way i can use a 3/32 with my 1/8 so he is wrong right?

  20. #20
    Veteran Racer TejanoTrackie's Avatar
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    Quote Originally Posted by sjmartin View Post
    So I do indeed have a 3/32 chain on a 1/8th cog. Post #2 states that there is no way i can use a 3/32 with my 1/8 so he is wrong right?
    ..
    Attached Images Attached Images
    What, Me Worry? - Alfred E. Neuman

    Quote Originally Posted by Dcv View Post
    I'd like to think i have as much money as brains.

  21. #21
    i smell bacon yummygooey's Avatar
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    Quote Originally Posted by tejanotrackie View Post
    ..
    qft
    // yummygooey

  22. #22
    Senior Member
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    Quote Originally Posted by sjmartin View Post
    So I do indeed have a 3/32 chain on a 1/8th cog. Post #2 states that there is no way i can use a 3/32 with my 1/8 so he is wrong right?
    There is no way you can use a 3/32" chain with a 1/8" cog.

    If you have a 1/8" chain, you can use any combination of 3/32" and 1/8" cogs and chainrings. If you have a 3/32" chain, everything in your drivetrain must be 3/32".

  23. #23
    Senior Member sjmartin's Avatar
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    Quote Originally Posted by Young Version View Post
    There is no way you can use a 3/32" chain with a 1/8" cog.

    If you have a 1/8" chain, you can use any combination of 3/32" and 1/8" cogs and chainrings. If you have a 3/32" chain, everything in your drivetrain must be 3/32".
    Thanks. So the bike description on the website is incorrect then. Even though it states 3/32 it is really 1/8. Appreciate the straight forward answer.

  24. #24
    Senior Member MuppetMower's Avatar
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    Its bikesdirect...

  25. #25
    Veteran Bastard Scrodzilla's Avatar
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    Wait...Bikes Direct gave incorrect specs???

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