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How to understand metric tire sizes

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

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Was this helpful to you?

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

    57.3%
  2. Yes, but I probably won't use this knowledge

    6.2%
  3. No, I didn't get anything out of this.

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  4. TACOMAWORLD ROCKS!

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  1. supremetaco2

    supremetaco2 Well-Known Member

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    concrete jungle, oahu
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    +hp, lifted, lights, dif breather mod, debadged, shorty antenna...
    was just wondering what those numbers meant.. great post man
     
  2. StaticFilter

    StaticFilter Well-Known Member

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  3. RelentlessTaco

    RelentlessTaco [OP] Custom Tacoma bumpers & more for your offroad toy Vendor

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    Had tons on the Taco's.... new truck is pretty stock
  4. 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. BSPDX

    BSPDX Well-Known Member

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    Good Post Relentless!:thumbsup:
     
  6. RelentlessTaco

    RelentlessTaco [OP] Custom Tacoma bumpers & more for your offroad toy Vendor

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    Had tons on the Taco's.... new truck is pretty stock
    Thanks man! :D
     
  7. elliott.estes

    elliott.estes Well-Known Member

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    yes this is a very useful post!
     
  8. 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. Tackz

    Tackz Well-Known Member

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    Great post! Very helpful!!!
     
  10. JW07Tacoma

    JW07Tacoma New Member

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    WOW, what an awesome place. Thanks for this info.
     
  11. ShaShasBoo

    ShaShasBoo Well-Known Member

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  12. nad

    nad mmmm tacos!

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    awesome, thanks for clearing this up
     
  13. JasoTaco

    JasoTaco Well-Known Member

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    Huge help! Good explanation.
     
  14. 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. 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. RelentlessTaco

    RelentlessTaco [OP] Custom Tacoma bumpers & more for your offroad toy Vendor

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    Had tons on the Taco's.... new truck is pretty stock
    Thanks for the recommendation, john. I'll probably add that stuff when I have enough time to do so. :)
     
  17. 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. 4x4FishTaco

    4x4FishTaco Active Member

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  19. Daniel Arthur

    Daniel Arthur Member

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    THANK YOU!!!

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



    Dan
     
  20. 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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