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SportTrac Discussion
Wheels, Tires & Brakes
New wheels
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<blockquote data-quote="blksn8k" data-source="post: 1023377" data-attributes="member: 64142"><p>From tirerack.com the formula for calculating approximate tire diameter would be [(cross section width x aspect ratio x 2) divided by 25.4 (conversion factor for mm to inches)] + wheel diameter in inches = tire diameter in inches. They don't state the formula in those exact terms but that is my interpretation to simplify the calculation.</p><p></p><p></p><p></p><p>For a 275/65/18 tire where X = Tire Diameter:</p><p></p><p></p><p></p><p>[(275mm x .65 x 2) / 25.4] + 18" = X</p><p></p><p></p><p></p><p>(375.5mm / 25.4) + 18" = X</p><p></p><p></p><p></p><p>14.075" + 18" = X</p><p></p><p></p><p></p><p>32.075" = X = Tire Diameter :haveabeer:</p></blockquote><p></p>
[QUOTE="blksn8k, post: 1023377, member: 64142"] From tirerack.com the formula for calculating approximate tire diameter would be [(cross section width x aspect ratio x 2) divided by 25.4 (conversion factor for mm to inches)] + wheel diameter in inches = tire diameter in inches. They don't state the formula in those exact terms but that is my interpretation to simplify the calculation. For a 275/65/18 tire where X = Tire Diameter: [(275mm x .65 x 2) / 25.4] + 18" = X (375.5mm / 25.4) + 18" = X 14.075" + 18" = X 32.075" = X = Tire Diameter :haveabeer: [/QUOTE]
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SportTrac Discussion
Wheels, Tires & Brakes
New wheels
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