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Thread: Metric - Imperial tire size conversion chart

  1. #1

    Metric - Imperial tire size conversion chart

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

    --------------------------------------------------------------------------------
    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"

    Keith '88 4runner SR5 Garage Thread

  2. #2

    Re: Metric - Imperial tire size conversion chart

    Good find!

    Just an FYI:

    Not all tires are the sizes listed, check the manufactures website to be sure.
    Marc<br />96&#39; T100 SR5 4x4<br /><br />Other rides:<br />00 Honda 416EX

  3. #3

    Re: Metric - Imperial tire size conversion chart

    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

  4. #4

    Re: Metric - Imperial tire size conversion chart

    Quote Originally Posted by troyboy162
    like CJM said there is some variance.
    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.
    Keith '88 4runner SR5 Garage Thread

  5. #5

    Re: Metric - Imperial tire size conversion chart

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

  6. #6

    Re: Metric - Imperial tire size conversion chart

    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
    Brian
    1998 Toyota 4Runner SR5 4x4
    Supercharged, URD'd, Lifted, etc. etc.
    Quote Originally Posted by GoodTimes
    I for one will say that I am the superb ultimate cream of the crop web wheeler and will not take anything less than that as my moniker.

  7. #7

    Re: Metric - Imperial tire size conversion chart

    Quote Originally Posted by mastacox
    Here you go, I've been meaning to make a Wiki on this for a while now:
    good job on the wiki
    Keith '88 4runner SR5 Garage Thread

  8. #8

    Re: Metric - Imperial tire size conversion chart

    Thanks for the wiki Brian!
    Lance
    TLCA Member

    2003 4Runner SR5 4x4 Chaos Edition
    2000 Toyota Landcruiser
    19xx M416 Trailer

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