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Old 01-17-2002, 10:02 AM
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tire question
what do the tire sizes mean specifically?

for instance:

225/40/18

what does it mean? is the 225/40 in mm and the 18 in inches?
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Old 01-17-2002, 10:27 AM
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225 is the width of the tire in mm, 40 is the height of the sidewall, meaning it is 40% of the width, and 18 is the diameter in inches.
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Old 01-17-2002, 10:32 AM
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Originally posted by SC TL
225 is the width of the tire in mm, 40 is the height of the sidewall, meaning it is 40% of the width, and 18 is the diameter in inches.
Thanks man
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Old 01-17-2002, 10:33 AM
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Why is it they use both metric and standard measurements Wouldn't it be better if they used one or the other
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