Converting race car tire sizes to standard form?

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11-30-2003, 01:09 PM

mantronix

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Converting race car tire sizes to standard form?

I was looking at some race car specs. The wheels were listed as 17x9, but the tires were listed as 24/61-17. What system of measurement is this? For the sake of comparison, how do I convert that to the usual 2xx/yyR17?

Thanks.

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12-01-2003, 01:15 PM

Lateapex

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Try this:

(section width in centimeters) / (diameter in centimeters) - (rim diameter in inches):

24/61-17:

(9.45" section width) / (24.02" diameter) - (17" wheels)

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12-01-2003, 02:00 PM

mantronix

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Quote:

Originally posted by Lateapex
Try this:

(section width in centimeters) / (diameter in centimeters) - (rim diameter in inches):

24/61-17:

(9.45" section width) / (24.02" diameter) - (17" wheels)

Thanks. That helps. I didn't know what the numbers in racing wheel notation represented.

I took the above and solved for aspect ratio. So in normal tire notation, the tire is a 240/37R17.

Cool, and weird.

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