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RE-gear for true 33"

Discussion in 'Wheels & Tires' started by sandman427, Mar 18, 2010.

  1. Mar 18, 2010 at 10:52 AM
    #1
    sandman427

    sandman427 [OP] KR FAB

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    i was just made aware that a true 33" isnt a 285 thats actually 32.5.... is the next size up 295 or 305...?? for a 33"...?? can u still keep stock gears or is that when u need to re gear..?? thanks
     
  2. Mar 18, 2010 at 10:55 AM
    #2
    06Bluez

    06Bluez Well-Known Member

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    Icon Coil-overs, TC UCA, with Bilstein 5150 and Icon 3 leaf pack. 17" Moto Metal 951 4.5" Backspacing wrapped in 285/70/17 BFG AT's. Demello front bumper and Avid offroad sliders.
    If you want to spend the money the go ahead and regear. The power diffeence isn't significant enough for me to justify spending the $$ to regear.
     
  3. Mar 18, 2010 at 10:56 AM
    #3
    Its_Taco_Time

    Its_Taco_Time Well-Known Member

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    It is not required, but would help restore your power.

    295/70/17 is probably the size you want. I think it nets you 33 1/4" by 11.5 wide
     
  4. Mar 18, 2010 at 10:57 AM
    #4
    ColtsTRD

    ColtsTRD .....

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    295...I know AZd54 is running 295s and he hasn't regeard...
     
  5. Mar 18, 2010 at 10:57 AM
    #5
    rmerchant3

    rmerchant3 Insert nonsense here

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    http://www.carbibles.com/tyre_size_calculators.html

    a 320/70/16 is a 33X12.5X16
    a 290/75/16 is a 33X11.5X16
    a 265/80/16 is a 33X10.5X16

    All those are exact. You can give and take (equally) from the width and sidewall percentage in increments of 5mm and 5% to achieve a very close (and very real tire :) ) 33"
     
  6. Mar 18, 2010 at 10:59 AM
    #6
    sandman427

    sandman427 [OP] KR FAB

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    thanks fellas... i was more worried if regearing was really required...
     
  7. Mar 18, 2010 at 11:04 AM
    #7
    sandman427

    sandman427 [OP] KR FAB

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    is wider better for traction or just looks..??? cuz i see a lot of people say that the 285s are way better for traction..?? please correct me if i am wrong....
     
  8. Mar 18, 2010 at 11:06 AM
    #8
    HBMurphy

    HBMurphy Ban Pending

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    also different manufacturers have different overall diameters... for the same size tire.
     
  9. Mar 18, 2010 at 11:08 AM
    #9
    JimBeam

    JimBeam BECAUSE INTERNETS!! Moderator

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    huge debate...theres a large following for the skinny tires (255 width) for offroading purposes...but a huge following for wider = better too

    very true


    each tire brand has different "in spec" sizes...

    listed tire sizes are sort of a nominal size...not all 285/75 tires will be the same height (may vary within an inch or so tall)

    also...the first number is the width...then the 2nd number is a ratio of the width determining height of the tire
     
  10. Mar 18, 2010 at 11:09 AM
    #10
    Its_Taco_Time

    Its_Taco_Time Well-Known Member

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    Wtf are those sizes? :confused::confused::confused: Never heard of any of those. Sure they look good on paper, but do they actually exist?

    EDIT: I know of the 295/75/16


    I get a little better traction in the rain, mostly for looks.
     
  11. Mar 18, 2010 at 11:09 AM
    #11
    TacoTron

    TacoTron Tacotronn

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    Im running 285s its 32.8 close enough for me
     
  12. Mar 18, 2010 at 11:11 AM
    #12
    MyToyTaco

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    Wider is better for traction, most of the time. Mostly in sand.. Air those wide tires down for a nice wide footprint and your golden..
     
  13. Mar 18, 2010 at 11:12 AM
    #13
    rmerchant3

    rmerchant3 Insert nonsense here

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    HAHAHA Yeah most of those are not even made. That's why I added the give or take part. Those numbers are for informational purposes only. If you were to take the light truck size and convert it for EXACT same size in metric that is what it would be. I edited it.
     
  14. Mar 18, 2010 at 11:15 AM
    #14
    sandman427

    sandman427 [OP] KR FAB

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    thats where i am confused... i would think a wider tire would be better for offroading... wider would grab more right??? my bad for the newb questions but its just something that has been buggin the hell outta me... lol... but than i see trucks with REALLY wide tires....
     
  15. Mar 18, 2010 at 11:16 AM
    #15
    sandman427

    sandman427 [OP] KR FAB

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    ay chris what size tires do u have..??
     
  16. Mar 18, 2010 at 11:17 AM
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    JimBeam

    JimBeam BECAUSE INTERNETS!! Moderator

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    and here is where the basis for the debate begins

    per expeditions west (article at link below)
    [​IMG]

    in sand wider is probably better...BUT on other surfaces...a skinnier tire may be better

    http://www.expeditionswest.com/research/white_papers/tire_selection_rev1.html
     
  17. Mar 18, 2010 at 11:21 AM
    #17
    sandman427

    sandman427 [OP] KR FAB

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    wwooww.... thats really intriguing... y is it that the skinnier tire able to grab more or in the pic grab into the groves more... i guess what i mean is whats making it do that... i would think the wider one would be better cuz its heavier if i would be going off that diagram..?? right??
     
  18. Mar 18, 2010 at 11:23 AM
    #18
    T@co_Pr3runn3r

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    To find out actual OD of tires just go to the manufacturer's web site and go to their size chart for the tires you are considering. The chart will show exact full tread ODs. Just because it's a certain width (285), doesn't automatically make it a certain OD (33") All 3 things determine the actual OD. You have to consider width, rim diameter & sidewall height to get exact OD.
     
  19. Mar 18, 2010 at 11:23 AM
    #19
    JimBeam

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    essentially what happens is as the sidewall is forced down...the wider tire is more likely to concave in the center than the skinny tire which forces the center of the tread up away from the ground (think upside down spoon)
     
  20. Mar 18, 2010 at 11:26 AM
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    Its_Taco_Time

    Its_Taco_Time Well-Known Member

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    Im running 287/75/16 right now, but just got new wheels/tires so after lunch today I am running 305/65/17 lol :D
     
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