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No Crybabies
11,684 Posts
what do you have?

Do you have any chains or cogs that you know the size of? You could compare.

If you have a 1/8" cog or chainring, a 3/32" chain will not wrap around it, but will sit up on the teeth.

Sometimes a chainring will have the size stamped on the back somewhere. Same for cogs.

You could measure your existing cog/freewheel, the width of the teeth.

Some websites incorrectly identify this spec as "pitch." This is not pitch. Almost everything is 1/2" pitch, the distance between adjacent teeth or links of a chain.
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