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31's on an '07?

Discussion in 'Wheels & Tires' started by squad314, Dec 14, 2007.

  1. Dec 14, 2007 at 2:34 PM
    #1
    squad314

    squad314 [OP] Thinks he's Steve McQueen

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    Apologies in advance if this has been asked and answered a number of times....I've searched and read but can't seem to find my answer.

    I've decided to swap out my factory 265/65/17 Bridgestone Dueler H/T's.I'd like something with better traction and a beefier look.Today I went to my local tire shop and talked to them about the Goodyear Wrangler Silent Armour's in 265/70/17.He instructed me to talk to Toyota beforehand to make sure that there wouldn't be any issues as far as the ABS system,speedo or any other concerns.The guy at Toyota(parts) admitted he wasn't sure but thought that you could go up 3% without issue.....Now the stocks are 30.6" and the new ones are 31.7" a difference of 3.5%....Again,at this point I don't have any lift planned,just an inch taller.On another note,I thought that the middle number in a tire size designation was the % of the tire width.Would these two sizes not indicate a 5% difference?........:confused:

    Then there's always the very good chance that my math is off or I don't have any idea what I'm talking about.If anyone can make sense of this mess I'd sure appreciate it....Thanks and sorry again for the noob questions.:eek:
     
  2. Dec 14, 2007 at 2:42 PM
    #2
    Toy4Life

    Toy4Life 668: The Neighbor of the Beast

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    The center # is a percentage. It's the ratio of sidewall height to tread width. So, even though it shows a 5% difference in the #'s, it isn't a 5% difference in tire height. The difference in tire height is what will throw off your speedometer and odometer.
     
  3. Dec 14, 2007 at 2:42 PM
    #3
    Toy4Life

    Toy4Life 668: The Neighbor of the Beast

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    That's all I got for you, hope it helps.
     
  4. Dec 14, 2007 at 2:46 PM
    #4
    jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Moderator

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    wat?
    here's a site for u to check out...http://www.rims-n-tires.com/rt_specs.jsp it shows a 3.7% difference as far as the speedo goes. i plan on going to a 255/75/17 in the spring, which is a 4.8% difference. i do plan on getting the speedo recalibrated afterwards though
     
  5. Dec 14, 2007 at 2:47 PM
    #5
    Toy4Life

    Toy4Life 668: The Neighbor of the Beast

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    Any idea what it costs to have that done?
     
  6. Dec 14, 2007 at 2:48 PM
    #6
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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  7. Dec 14, 2007 at 2:59 PM
    #7
    jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Moderator

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    wat?
    i have no idea...there are things that u can buy to change the tire sizes and its urs, so u can do it over and over again...for like $125-200
     
  8. Dec 14, 2007 at 4:10 PM
    #8
    squad314

    squad314 [OP] Thinks he's Steve McQueen

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    Thanks for the replies guys,they were all helpful....So we've determined that the extra inch of overall height will make the speedo read 2 mph slow at 60 mph,that I can certainly live with.My only real concern would be causing ABS or computer problems.
     
  9. Dec 14, 2007 at 4:17 PM
    #9
    jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Moderator

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    wat?
    people on here drive on larger tires than 31.7" and do fine the only thing i would think of is the speedo which i do believe would make the odometer read wrong as well, right guys?
     
  10. Dec 14, 2007 at 4:21 PM
    #10
    Toy4Life

    Toy4Life 668: The Neighbor of the Beast

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    yes, that is correct. If you follow your fuel mileage, that will be off too.
     
  11. Dec 14, 2007 at 4:32 PM
    #11
    jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Moderator

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    wat?
    definately y i wanna get a speedo cal for myself
     
  12. Dec 14, 2007 at 4:46 PM
    #12
    Toy4Life

    Toy4Life 668: The Neighbor of the Beast

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    Same here, but I don't plan on changing tire sizes again. A one time calibration would be good for me.....if it is considerably cheaper.
     
  13. Dec 14, 2007 at 4:55 PM
    #13
    concrete jedi

    concrete jedi Well-Known Member

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    Hey squad, Google tires, on one of the pages there is a tire calculator, imput the current size then imput the new size and it will figure how off you will be. You can actually fiddle around with it and get them pretty close. hope this helps. :thumbsup:
     
  14. Dec 14, 2007 at 4:57 PM
    #14
    jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Moderator

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    wat?
    i one day hope to have an extra set of tires/rims just for going offroad and one for everyday use, so i'd eventually get my money's worth outta the cal
     
  15. Dec 14, 2007 at 5:03 PM
    #15
    Toy4Life

    Toy4Life 668: The Neighbor of the Beast

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    I've thought of doing that also, but in reality, it probably won't ever happen. Or, by the time it does, this will be a trail truck and I'll have a new on road truck.
     
  16. Dec 14, 2007 at 6:32 PM
    #16
    SLOTaco

    SLOTaco Ultimate Member

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    Squad, I went in and had my tires swapped out for 265/70/17's almost right away. I got the BFG All Terrains. They fit fine, at first there was some VERY minor rubbing, no damage or anything, and even then only when I pinned the steering one way or another. The rubbing went away after a month or so as the tires wore slightly. What can have a lot to do with rub is the tread pattern as well. Sometimes the best thing to do is just put the tires on and turn the wheels to see what happens.
     
  17. Dec 14, 2007 at 6:39 PM
    #17
    squad314

    squad314 [OP] Thinks he's Steve McQueen

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    Thank you jedi and SLO for your contributions....That settles it...31's here I come.

    Dunno how Santa's gonna fit those babies in his sack............:D
     
  18. Dec 14, 2007 at 6:41 PM
    #18
    SLOTaco

    SLOTaco Ultimate Member

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    Merry Christmas Man!
     
  19. Dec 14, 2007 at 6:57 PM
    #19
    jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Moderator

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    wat?
    what are me and toy4life....chopped liver?!?!?! haha j/k
     
  20. Dec 14, 2007 at 7:03 PM
    #20
    squad314

    squad314 [OP] Thinks he's Steve McQueen

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    See post #8.......^^^. :D;)
     
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