RX7Club.com - Mazda RX7 Forum - Race Slick Question

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jimmacsrx7

03-31-10 06:24 AM

Race Slick Question

285/645/18. What does the sidewall height of 645 relate to? Is it a 35/30/40 etc....? Thanks,
Jim

ptrhahn

03-31-10 07:04 AM

It's the overall diameter of the tire... race tires don't use that silly sidewall-as-percentage-of-width/aspect ratio garbage that street tires do.

It's millimeters, so divide by 25.4 to get the height in inches.

jimmacsrx7

03-31-10 10:07 PM

Thanks... on track soon I hope..

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