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**pjmoreland** · 09-09-2021, 05:01 PM

The lazy way is to use a calculator like the one on this webpage.

https://www.tciauto.com/speedometer-gear-calculator

Scroll down to "Tire Diameter Calculator".

09-09-2021, 05:01 PM	#10
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 6,235	Re: Mismatched tire diameters... The lazy way is to use a calculator like the one on this webpage. https://www.tciauto.com/speedometer-gear-calculator Scroll down to "Tire Diameter Calculator".