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Different sized spare

Discussion in 'Wheels & Tires' started by O.C., Mar 20, 2011.

  1. Mar 20, 2011 at 8:26 AM
    #1
    O.C.

    O.C. [OP] Well-Known Member

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    Currently running stock rugged trails on my 08 DC OR. I am looking at the BFG ATs. I would like to go with 265/75/16. My question is that the full size spare is a brandy new rugged trail 265/70/16. Will I risk any damage to the truck using the spare in a pinch? Other than the obvious handling issue.[​IMG] I would only use it until the damaged tire was replaced. If I can get away with not dropping another $200 on a spare, that would be great!
     
  2. Mar 20, 2011 at 8:34 AM
    #2
    OffroadToy

    OffroadToy This ain't Dodge City, and you ain't Bill Hickok

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    I just went to the 265/75/16 bfg a/t's and still have the 265/70/16 rugged fail spare. I think as long as you use the spare on the front and don't use 4WD while it's on you should be fine...just get the fullsize tire back on asap.
     
  3. Mar 20, 2011 at 12:48 PM
    #3
    Yamaha Dave

    Yamaha Dave Well-Known Member

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    Don't run that spare on the Front! You will be fine running that size, but you want to run it on the rear so it doesn't affect your steering. I wouldn't run it long term, but it will be fine to get you to a tire shop.
     
  4. Mar 20, 2011 at 12:50 PM
    #4
    brutalguyracing

    brutalguyracing BIG DADDY

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    F.U> GUYZ
    broken mods
    this^^^^^^^^^^^
    fail
    never run diff size on rear.............
    say bye bye third member
     
  5. Mar 20, 2011 at 12:55 PM
    #5
    brp

    brp Well-Known Member

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    Can somebody tell me why it would damage the rear dif if the dif was open? If you have TRAC on or a locker, then I get it. When I was learning about TRAC I had one rear wheel spinning away all day on ice and the other was stationary on pavement, no damage.
     
  6. Mar 20, 2011 at 1:01 PM
    #6
    Yamaha Dave

    Yamaha Dave Well-Known Member

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    Sorry but when it comes to my life I'd rather be safe by being able to steer and brake properly by having the same size tires on the front than the rear.
     
  7. Mar 20, 2011 at 1:04 PM
    #7
    skytower

    skytower Well-Known Member

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    The rear tires will turn at differant speeds. The spider gears will spin to compensate.
    It will be fine for short distances. Damage to the differential occurs when spinning one wheel. It flings off the oil and burns up. This wont be the case with mildly mismatched tires.
     
  8. Mar 20, 2011 at 1:05 PM
    #8
    jandrews

    jandrews Carolina Alliance Southwest Region Ambassador

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    Rear diff open should cause no problems running it on the rear. The tires will rotate at different speeds due to the different circumferences, and different tire speed rotation is the purpose of the differential.

    It's not ideal, but it's fine to get you to a tire shop.
     
  9. Mar 20, 2011 at 1:05 PM
    #9
    brutalguyracing

    brutalguyracing BIG DADDY

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    F.U> GUYZ
    broken mods
    you wana be safe then get the right size spare...its that simple.....
     
  10. Mar 20, 2011 at 1:16 PM
    #10
    Yamaha Dave

    Yamaha Dave Well-Known Member

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    It's not me that has the mismatched tires, remember I'm not the original poster. I'm just saying for the OP ideally that is what I'd do in his situation.

    I run TRD 16" wheels on Goodyear Duratracs, 265/75/16. My spare.... is a TRD 16" wheel on a Goodyear Duratrac, 265/75/16. :D
     
  11. Mar 20, 2011 at 1:22 PM
    #11
    O.C.

    O.C. [OP] Well-Known Member

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    So.....after all that....as long as I take it easy and replace the flat asap, it shouldn't be a problem. Drive like an ass with the spare on....problems. Yes?
     
  12. Mar 20, 2011 at 1:26 PM
    #12
    jandrews

    jandrews Carolina Alliance Southwest Region Ambassador

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    Drive like an ass anytime, problems.

    Especially when running a donut.

    So yes.
     
  13. Mar 20, 2011 at 1:32 PM
    #13
    Yamaha Dave

    Yamaha Dave Well-Known Member

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  14. Mar 20, 2011 at 1:39 PM
    #14
    O.C.

    O.C. [OP] Well-Known Member

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    The 265/75/16s will end up giving me about 0.5 in lift over 70s? Maybe?
     
  15. Mar 20, 2011 at 1:40 PM
    #15
    OZ-T

    OZ-T Quite an experience to live in fear , isn't it ?

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    Yes
     
  16. Mar 20, 2011 at 1:50 PM
    #16
    O.C.

    O.C. [OP] Well-Known Member

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    :yay:Decision made. BFG AT 265/75/16s it is! C'mon tax return!:yay:

    Thanks for the input guys.
     
  17. Mar 20, 2011 at 1:53 PM
    #17
    OZ-T

    OZ-T Quite an experience to live in fear , isn't it ?

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    There is a tire conversion calculator on site at ths top of the page in a drop down menu .
     
  18. Mar 20, 2011 at 2:07 PM
    #18
    O.C.

    O.C. [OP] Well-Known Member

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    Ah yes...1.04 in difference in hight. So 0.52 in lift. I've started at that calculator long and hard. I like the overlay option.
     
  19. Mar 20, 2011 at 2:11 PM
    #19
    brutalguyracing

    brutalguyracing BIG DADDY

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    F.U> GUYZ
    broken mods
    now bring your trucks ass to the rc meet on april 9+10th
     
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