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Is 255/75 R16 bigger than 265/70R16

Discussion in 'Wheels & Tires' started by ShaLor, Jun 26, 2010.

  1. Jun 26, 2010 at 1:30 AM
    #1
    ShaLor

    ShaLor [OP] Well-Known Member

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    Shane
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    Custom mud flap removal from rock on trail :), Tailgate Hose Clamp Mod, Cobra 75 wx st CB install, 19 more D-Rings in the bed, Satoshi Grill, Fog Lamp on any time mod. Relentless Fab CB antenna hood mount, LED bed lights, Demello Hybrid Sliders, Undercover Tonneau Cover, Lighted 4x4 switch
    I am looking at buying a used 2004 Tacoma Double Cab 4x4 with TRD Off Road package. This particular truck comes with p255/75 R 16 tires on it. They look like they are bigger than the stock tires, but it seems like the stock tires on the Off Road package is supposed to be p265/70 R16.

    Am I seeing things? They look bigger but the numbers indicate that it is a smaller tire to me. What will this change of tire size do for my fuel economy and torque etcetera?

    Any help would be greatly appreciated. I searched the forums, but am more confused than when I started.:confused:
     
  2. Jun 26, 2010 at 2:09 AM
    #2
    Stupid hurts.

    Stupid hurts. Hoogie boogie!

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    265/70R16 is roughly 30.6 in. in diameter and 255/75R16 is roughly 31.1 in. in diameter so it is slightly bigger. Shouldn't make a significant difference if anything. By the numbers it may seem like a smaller tire, but the first set of numbers (in this case 255) is the width in millimeters while the second set of numbers (75) is the tire's sidewall height as a percentage of its width (255 mm.) thus making it a taller, but not wider tire than the 265/70R16. Hope this helps! :thumbsup:
     
  3. Jun 26, 2010 at 2:14 AM
    #3
    JCM_Buford

    JCM_Buford Member

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    I may be wrong, been there before,but ....

    I think the first number (255) is to the width of the tire. The second number is the of height compared to the width (75%).
    That would yield (255)(.75) = 191.25 for the first and 186.9 for the second.

    Yes the first is a little bigger for height of tire but not for tread width....
     
  4. Jun 26, 2010 at 2:15 AM
    #4
    ColtsTRD

    ColtsTRD .....

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    yup^ ^ ^
     
  5. Jun 26, 2010 at 2:18 AM
    #5
    JCM_Buford

    JCM_Buford Member

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    Hey Steven... It's 5:16 AM here in Georgia,, Don't you guys sleep out there in Southern California??
     
  6. Jun 26, 2010 at 2:20 AM
    #6
    Stupid hurts.

    Stupid hurts. Hoogie boogie!

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    Haha, my sleep schedule has been thrown off lately. I'm actually just about to hit the hay. :)
     
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