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31 x 11.5 Tires


Guest fefe2004
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Guest fefe2004

They are Goodyear Wranglers AT. I bought a used pickup and it came with these tires. I didn't kown that size existed. At present they are in my dad's 1995 Pathfidner, no rubbing at all. I'll have to try in my 1996 to see how it goes.

Fernando

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  • 3 weeks later...

yep. We'll work with your example, 235/75R15

 

the first number, 235, is the tire's width in mm. There are 25.4 mm in one inch. So, 235 / 25.4 = 9.25 inches in width.

 

The second number is the aspect ratio (ratio of sidewall height to width). In this case, the sidewall is 75% as tall as the tire is wide. So, 235 x .75 = 176.25 Multiply this by two (since there is a sidewall on either side of the rim). 176.25 x 2 = 352.5 mm total sidewall height

 

Then figure out the rim's diameter in mm. 15 x 25.4 = 381 mm

 

381 + 352.5 = 733.5 mm is the total tire height

 

733.5 / 25.4 = 28.88 inches in total tire height

;)

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  • 2 weeks later...

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