tire sizes
#3
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Year: 1996
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It changes a lot based on the width and aspect ratio. I've noticed a lot of guys on jeep/truck forums don't understand how it works and think a 305 is a 33, 315 is a 35, etc. This is NOT correct, don't let anybody tell you it is. You can find the equivalent size in imperial units like this:
Width: divide first number (215,275,315, etc) by 25.4.
Height: divide first number (215,275,315, etc) by 25.4, then multiply by the second number (40,75, etc), then multiply by two and add your rim diameter
Width: divide first number (215,275,315, etc) by 25.4.
Height: divide first number (215,275,315, etc) by 25.4, then multiply by the second number (40,75, etc), then multiply by two and add your rim diameter
#4
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Year: 1987
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Engine: 4.2 .020 over
Your wrong on the height conversion!!
((((235/25.4)*70)*2)+16) is 1311.2
The correct way is
((235*70)*2/2550)+16 = 28.9
A 235/70-16 tire is 28.9in tall not 1311
((((235/25.4)*70)*2)+16) is 1311.2
The correct way is
((235*70)*2/2550)+16 = 28.9
A 235/70-16 tire is 28.9in tall not 1311
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#7
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Year: 1996
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Originally Posted by 87xj Pioneer
Your wrong on the height conversion!!
((((235/25.4)*70)*2)+16) is 1311.2
The correct way is
((235*70)*2/2550)+16 = 28.9
A 235/70-16 tire is 28.9in tall not 1311
((((235/25.4)*70)*2)+16) is 1311.2
The correct way is
((235*70)*2/2550)+16 = 28.9
A 235/70-16 tire is 28.9in tall not 1311
Also, your divisor should be 2540 not 2550
Last edited by Hoooper; 05-04-2011 at 03:10 PM.
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