Understanding Tire Size
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Understanding Tire Size
Sorry to sound like a rookie here, but does the 2nd number ina tire size mean the higher the number the more "thicker" the wall profile?
Like a 275/35/20 compared to a 275/40/20?
Any info would be greatly appreciated to educate me. Thanks!
Like a 275/35/20 compared to a 275/40/20?
Any info would be greatly appreciated to educate me. Thanks!
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Joined: Nov 2004
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From: Delawhere?
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The second number is the height of a single sidewall compared to the tread width.
So,
275mm across the tread
The sidewall is 35% of 275mm
The wheel is 20 inches
You need to count the sidewall twice for overall height.
or
(2(275 x .35))/25.4+20
The 25.4 is to convert mm to inches. A 275/35/20 is 27.58 inches high. A 275/40/20 is 28.66 inches high.
So,
275mm across the tread
The sidewall is 35% of 275mm
The wheel is 20 inches
You need to count the sidewall twice for overall height.
or
(2(275 x .35))/25.4+20
The 25.4 is to convert mm to inches. A 275/35/20 is 27.58 inches high. A 275/40/20 is 28.66 inches high.
Last edited by Gramicci101; Jan 28, 2009 at 07:43 AM.
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