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Tire tread a factor in tire size?

Discussion in 'Wheels & Tires' started by nvdeserted, Oct 18, 2010.

  1. Oct 18, 2010 at 6:50 PM
    #1
    nvdeserted

    nvdeserted [OP] Well-Known Member

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    Howdy.

    Is a tire's tread-depth/lug height figured into the tire size?

    Like if you had 2 tires, same brand and size, but one was a burly mud-tire and the other was highway tire and you drove both of them all the way bald, would both of the tires be the same size without the tread?

    Would a 35" tire, for example, if everything was the same except for the tread all be the same height? if you had a 35" BFG mudder, all terrain, and road tire all sitting together, are they just as tall as each other? Or would the mudder be the tallest, AT second, and road tire 3rd tallest as ranked by tread size?
     
  2. Oct 19, 2010 at 9:57 PM
    #2
    nvdeserted

    nvdeserted [OP] Well-Known Member

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    Bump.

    Does my question not make sense?
     
  3. Oct 19, 2010 at 10:06 PM
    #3
    CopDoctor

    CopDoctor Well-Known Member

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    usually they'll all be pretty close to eachother. m/t and a/t will run a tad taller but only about 1/4in or so tops
     
  4. Oct 20, 2010 at 11:12 AM
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    Rocketball

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    I'm not sure where the manufacturers measure the tire size. That's a very interesting question.

    I do know that between different models and manufacturers, the same stated tire size may have a different rolling circumference (overall circumference of the tire as it touches the roadway).
     
  5. Oct 20, 2010 at 11:15 AM
    #5
    TurfTaco

    TurfTaco Is there a long john silvers on the island?

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    This seems to be a stumper...usually guys race to see who can answer first. O powerful master chris hasnt even chimed in.
     
  6. Oct 20, 2010 at 11:17 AM
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    Manlaan

    Manlaan Well-Known Member

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    Pretty sure it varies per manufacturer. I really dont think there is a standard. One will measure it bald, one at full tread, and one half way between the two. It might even vary between different models in the same company.
     
  7. Oct 20, 2010 at 11:19 AM
    #7
    Pugga

    Pugga Pasti-Dip Free Since 1983

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    No, it makes sense and I'm surprised someone hasn't come up with the correct answer yet. I've never thought about it but it's a damn good question, M/T's have some pretty deep lugs.
     
  8. Oct 20, 2010 at 11:22 AM
    #8
    iSTIZO99

    iSTIZO99 Well-Known Member

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    Maybe one of our resident tire peddlers on here could answer this...interesting question!
     
  9. Oct 20, 2010 at 11:35 AM
    #9
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    Yes
    No (it would depend on the # of plys of the tire also)
    All the same height (with in reason)
     
  10. Oct 20, 2010 at 11:40 AM
    #10
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    Did you miss the within reason part?
     
  11. Oct 20, 2010 at 11:42 AM
    #11
    Pugga

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  12. Oct 20, 2010 at 11:44 AM
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    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    It's kinda open ended.........CYA clause
     
  13. Oct 20, 2010 at 11:47 AM
    #13
    Pugga

    Pugga Pasti-Dip Free Since 1983

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    The OPs original question was to find out the height difference between tires with various tread depths. So if you have 3 BFG tires an M/T, A/T and H/T, all the same size (say 265/70R17), are they the same height new or bald? Obviously there's not a huge height difference between them but the tread depth has to be accounted for somehow.
     
  14. Oct 20, 2010 at 11:50 AM
    #14
    BrettBretterson

    BrettBretterson Wild Ginger

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    Tread depth is NOT taken into account when talking about tire size. As many have said, it depends on manufacturer. Compare different style tires from the same manufacturer and you will see differences in actual size.

    BFGoodrich for example; 31x10.50x15: Mud-Terrain = 30.8, All-Terrain = 30.7.
     
  15. Oct 20, 2010 at 12:08 PM
    #15
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    Why is a 31/10.5 R15 not actually 31" tall?
     
  16. Oct 20, 2010 at 12:10 PM
    #16
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    AH-HA!!!!!!!
     
  17. Oct 20, 2010 at 12:11 PM
    #17
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    Why is it called a .38 when it's actually a .357 (.358) bullet?
     
  18. Oct 20, 2010 at 12:14 PM
    #18
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    Same could be said with a .222 and .223. They use a .224 bullet.
     
  19. Oct 20, 2010 at 12:23 PM
    #19
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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  20. Oct 24, 2010 at 6:59 PM
    #20
    nvdeserted

    nvdeserted [OP] Well-Known Member

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    Thanks, I guess.
     
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