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Old 04-24-11, 02:39 PM   #1
sjmartin
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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?
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Old 04-24-11, 02:43 PM   #2
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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.
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Old 04-24-11, 02:43 PM   #3
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3/32 chain cannot be used on a 1/8 cog or chainring.
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Old 04-24-11, 03:05 PM   #4
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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...
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Old 04-24-11, 03:11 PM   #5
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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
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Old 04-24-11, 03:12 PM   #6
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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.
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Old 04-24-11, 03:13 PM   #7
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it's my track bike
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Old 04-24-11, 03:16 PM   #8
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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?
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Old 04-24-11, 03:21 PM   #9
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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...
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Old 04-24-11, 03:22 PM   #10
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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
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Old 04-24-11, 03:24 PM   #11
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Quote:
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I meant the thickest part of the teeth considering teeth are tapered, that's 1/8.
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Old 04-24-11, 03:27 PM   #12
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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:

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Old 04-24-11, 03:31 PM   #13
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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


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Old 04-24-11, 03:32 PM   #14
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1/8=4/32
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Old 04-24-11, 03:41 PM   #15
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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)
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Old 04-24-11, 03:45 PM   #16
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Quote:
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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)
..
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Old 04-24-11, 04:21 PM   #17
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Quote:
Originally Posted by anthropy View Post
1 inch = 2.54 cm
.


Ftfy
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Old 04-24-11, 04:28 PM   #18
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Oh Tom
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Old 04-24-11, 05:02 PM   #19
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Quote:
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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
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?
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Old 04-24-11, 05:07 PM   #20
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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?
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Old 04-24-11, 05:53 PM   #21
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..
qft
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Old 04-24-11, 07:01 PM   #22
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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".
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Old 04-24-11, 07:10 PM   #23
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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.
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Old 04-24-11, 07:20 PM   #24
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Its bikesdirect...
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Old 04-24-11, 09:24 PM   #25
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Wait...Bikes Direct gave incorrect specs???
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