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How to understand metric tire sizes

Discussion in 'Wheels & Tires' started by RelentlessFab, Jan 13, 2009.

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Was this helpful to you?

  1. Yes, I now understand how to convert sizes myself

    59.1%
  2. Yes, but I probably won't use this knowledge

    5.4%
  3. No, I didn't get anything out of this.

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  4. TACOMAWORLD ROCKS!

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  1. Aug 20, 2009 at 8:30 AM
    #21
    supremetaco2

    supremetaco2 Well-Known Member

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    was just wondering what those numbers meant.. great post man
     
  2. Nov 12, 2009 at 7:24 PM
    #22
    StaticFilter

    StaticFilter Well-Known Member

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  3. Nov 12, 2009 at 7:45 PM
    #23
    RelentlessFab

    RelentlessFab [OP] Eric @Relentless Fab Vendor

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  4. Nov 12, 2009 at 8:23 PM
    #24
    StaticFilter

    StaticFilter Well-Known Member

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    Yeah but that calc i posted tells me my 35x12.50R17 is a 318/72 R17 no calculations needed
     
  5. Nov 17, 2009 at 4:28 PM
    #25
    ST77

    ST77 Pavement is Lava

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    Good Post Relentless!:thumbsup:
     
  6. Nov 17, 2009 at 4:37 PM
    #26
    RelentlessFab

    RelentlessFab [OP] Eric @Relentless Fab Vendor

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    Thanks man! :D
     
  7. Jan 3, 2010 at 8:37 PM
    #27
    elliott.estes

    elliott.estes Well-Known Member

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    yes this is a very useful post!
     
  8. Jan 27, 2010 at 9:39 AM
    #28
    David K

    David K Well-Known Member

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    Nice job!

    I like de-coding the mysteries, too!

    That's why I did this LONG signature explaining the '09+ drive system we Off Road 4WD Tacos have now!...
     
  9. Feb 24, 2010 at 9:09 PM
    #29
    Tackz

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    Great post! Very helpful!!!
     
  10. Mar 11, 2010 at 6:03 AM
    #30
    JW07Tacoma

    JW07Tacoma New Member

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    WOW, what an awesome place. Thanks for this info.
     
  11. Mar 22, 2010 at 6:37 AM
    #31
    ShaShasBoo

    ShaShasBoo Well-Known Member

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  12. Mar 22, 2010 at 9:17 AM
    #32
    nad

    nad mmmm tacos!

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    awesome, thanks for clearing this up
     
  13. Mar 30, 2010 at 8:35 PM
    #33
    JasoTaco

    JasoTaco Well-Known Member

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    Huge help! Good explanation.
     
  14. May 15, 2010 at 4:24 AM
    #34
    buddywh1

    buddywh1 Well-Known Member

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    A nice, simple explanation! Much better than the one on Tire Rack, if I may say!

    One other thing I found out though...'tire width' doesn't mean tread width. I was comparing new tires side by side: 'bone stock' 245/75/16 vs. 265/75/16 and 265/70/16 (the popular plus sizes for Tacoma's). Exact same tire...mfr. and brand.

    I was surprised to find the 265/75 tread was quite a bit narrower than the 265/70 even though taller as expected. Checking Tire Rack again: the 265 refers to 'section width', an important distinction!

    I suspect the shorter profile of the 70 series gives more sidewall support allowing the tread width (and contact patch area) to be wider for a given section width?

    Just something to keep in mind when tire shopping!
     
  15. May 15, 2010 at 4:46 AM
    #35
    JDMcQ

    JDMcQ Well-Known Member

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    Great thread Eric!

    If I might make a suggestion, can you expand your original post to include an explanation of the other info on the sidewall? Load range, treadwear rating, speed rating, date of manufacture. I think that would help folks out as well.
     
  16. May 15, 2010 at 11:19 AM
    #36
    RelentlessFab

    RelentlessFab [OP] Eric @Relentless Fab Vendor

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    Thanks for the recommendation, john. I'll probably add that stuff when I have enough time to do so. :)
     
  17. May 15, 2010 at 12:37 PM
    #37
    JDMcQ

    JDMcQ Well-Known Member

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    Cool, I think that you have cleared up a lot of confusion for some folks here.
     
  18. Sep 1, 2010 at 10:22 AM
    #38
    4x4FishTaco

    4x4FishTaco Active Member

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  19. Nov 30, 2010 at 9:35 AM
    #39
    Daniel Arthur

    Daniel Arthur Member

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    THANK YOU!!!

    Good Job In Explaining Tire Code. Just What I Needed.



    Dan
     
  20. Dec 6, 2010 at 8:51 AM
    #40
    thebikeguy

    thebikeguy Well-Known Member

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    perfect write up! i am one of those guys that wasn't sure how to work this out. i always just typed it into a tire calculator. very simple now that i see it on paper. if anything, u helped one TW mbr.
     

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