Sprocket ratio

rrlund · May 21, 2013

This sounds simple,but I want to make sure it's right. Will a 20 tooth drive and a 28 tooth driven give the same speed as a 10 tooth drive and a 14 tooth driven?

RGMartin · May 21, 2013

JRSutton · May 21, 2013

yup - if you're ever in doubt divide each set of numbers.

10/14 = .714
20/28 = .714

ss55 · May 21, 2013

A 10 tooth chain sprocket will create some chain vibrations, 13 tooth or greater sprockets let the chain to run smoother.

A 15/21 tooth sprocket combination would run smoother than a 10/14 combination. Same .714 ratio.

rrlund · May 21, 2013

Thanks. I don't know if I've had a stroke or just too much stress this spring. My mind don't work for nuthin!

Paul from MI · May 21, 2013

The ratio is the same, so the speed change will be the same. Larger sprockets will carry more horsepower, but chain speed is higher for a given rpm. Kind of a trade-off, with out knowing the sspped and horsepower involved it's hard to recommend on set over the other, space available is a factor too.

Sprocket ratio

rrlund

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RGMartin

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JRSutton

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ss55

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rrlund

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Paul from MI

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