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how to find tire sizes

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Old Feb 26, 2004 | 03:12 AM
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NUTBUTER's Avatar
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Staging Lane
 
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From: NY
Post how to find tire sizes

I use this for width and height

example 275/40/17 take 275 divide by 25.4 = width 10.82 in inches times that # by .40 the aspect ratio = 4.33" times 2 for top and bottom of the tire = 8.66" add 17" for the rim size and bingo 25.66" over all height this will very up and down with different tire makes but seems to be close most of the time with in .05" over all

does this seem correct to you guys
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Old Feb 26, 2004 | 09:58 AM
  #2  
Xsta Z 28's Avatar
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That is the correct way to mathmatically calculate the OD of a tire.
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