Talk of The Villages Florida - View Single Post - bigger tires
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Old 01-25-2016, 11:50 AM
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ajbrown ajbrown is offline
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Quote:
Originally Posted by Dr Winston O Boogie jr View Post
snipped by Alan

For example, if the outside diameter of a tire was 12" the the circumference would be approximately, 18.85" A tire with a 14" outside diameter would have a circumference of 22". The 12" tire would travel 18.85 inches every revolution and the 14" tire would travel 22". Assuming that the speed of the revolutions is the same, the larger tire would travel 18.85 inches sooner then the smaller tire. Or, the larger tire would travel 22" in the same time that the smaller tire travels 18.85 inches. Either of which is the definition of going faster.

snipped by Alan...
You had me right up to the paragraph i left from your OP. If I have not made a silly error here are the details...

If the OD of a tire is 12 inches, the circumference is 37.7 inches.
If the OD of a tire is 14 inches , the circumference is 43.98

A more real world example is the stock tires on an 8 inch rim that came with my Club Car versus the bigger 205-65-10 tires on 10 inch rims.

Stock tires: 18 diameter has a circumference of 56.55
205-65-10: 20.5 inch diameter has a circumference of 64.4

I go about 8 inches further with the larger tires during one revolution.
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