Metric - Imperial tire size conversion chart

found this and thought I would post it up for posterity sake - maybe sticky or wiki?

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Metric to Imperial tire conversion chart
Metric = Imperial Metric = Imperial Metric = Imperial
215/75/15 27.7"x 8.5" 245/75/16 30.5"x 9.6" 315/70/17 34.9"x 12.9"
225/70/15 27.4"x 8.9" 255/70/16 30.0"x 10.0" 275/65/18 32.1"x 11.0"
225/75/15 28.3"x 8.9" 265/70/16 30.6"x 10.4" 375/50/18 33.0"x 15.4"
235/75/15 29.0"x 9.3" 265/75/16 31.6"x 10.4" 325/60/18 33.2"x 13.3"
245/75/15 29.5"x 9.6" 275/70/16 31.2"x 10.8" 325/65/18 34.8"x 13.5"

255/75/15 30.0"x 10.0" 285/75/16 32.8"x 11.2" 305/70/18 35.0"x 12.2"
265/75/15 30.6"x 10.4" 295/75/16 33.4"x 11.6" 375/60/18 35.7"x 15.5"
205/85/16 29.7"x 8.1" 305/70/16 33.0"x 12.2" 395/65/18 37.8"x 15.7"
215/75/16 28.7"x 8.5" 315/75/16 34.8"x 12.9" 325/50/20 33.0"x 13.2"

225/70/16 28.4"x 8.9" 375/55/16 32.8"x 15.5"
225/75/16 29.2"x 8.9" 395/70/16 37.9"x 16.0"

235/70/16 29.0"x 9.3" 245/70/17 30.6"x 9.8"
235/85/16 31.7"x 9.3" 265/70/17 31.6"x 10.7"
245/70/16 29.5"x 9.6" 285/70/17 33.0"x 11.5"

Good find!

Just an FYI:

Not all tires are the sizes listed, check the manufactures website to be sure.

thanks! these are a good reference. like CJM said there is some variance. my treadwrights are listed as 33.2" i would imagine thats about the size of most deep lug 285's

Quote:

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Originally Posted by troyboy162

like CJM said there is some variance.

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that's true with any tire, regardless of having an Imperial or Metric size . . . My 32" BFG AT's with ~80% tread left only measure 31" with the tire off the ground. Rule of thumb is that the true diameter is generally smaller than the size listed.

Funny Chart, but good info. My 36" tires are not listed, and they were only 35.5's when they were new.

Here you go, I've been meaning to make a Wiki on this for a while now:

http://www.ultimateyota.com/index.ph...ire-conversion

If a tire size is missing in there, the reason its a Wiki is so people can add to it at will. Try to keep things in order :)

Quote:

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Originally Posted by mastacox

Here you go, I've been meaning to make a Wiki on this for a while now:

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:thumbup: good job on the wiki

Thanks for the wiki Brian!