Thread: difference between 39 and 38 tooth chainring?
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Old 07-11-12 | 06:51 PM
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AEO
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From: A Coffin Called Earth. or Toronto, ON

Bikes: Bianchi, Miyata, Dahon, Rossin

negligible difference.

This is all about gear ratios.

39:27 = 1.444
38:27 = 1.407

which ends up at around 1/4mph difference in the low range.
http://home.earthlink.net/~mike.sherman/shift.html
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Last edited by AEO; 07-11-12 at 06:56 PM.
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