Thread: Tire recommendation
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Old 01-15-2012, 08:14 PM   #18
Tru2Chevy
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Quote:
Originally Posted by WildBillyT View Post
I believe the aspect ratio is a percentage.

275 = 275mm wide
40 = 40% of 275mm is the height of the tire
17 = rim size
To clarify further, that means sidewall height, not overall height of the tires. So a 275/40/17 should have a 110mm sidewall height.

- Justin
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