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Spare tire maximum size

Discussion in 'General 4Runner Talk' started by 4runGirl88, Jul 22, 2022.

  1. Jul 22, 2022 at 11:29 AM
    #1
    4runGirl88

    4runGirl88 [OP] Get a little mud on the tires!

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    Does anyone know what the maximum size of tire the spare storage can handle? I'm looking to get one to match my other 285/55r20s.

    I did a thread search, but couldn't find info. If possible please point me in the right direction. Thank you!
     
  2. Jul 22, 2022 at 12:20 PM
    #2
    Altitude4x4

    Altitude4x4 New Member

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    285/70/17 is the max as far as I know, you can also fit 255/80/17 as well. Not familiar with 20" wheel variants though.
     
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  3. Jul 22, 2022 at 12:22 PM
    #3
    Mtbpsych

    Mtbpsych New Member

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    I fit a 295/70/17.
     
  4. Jul 22, 2022 at 1:09 PM
    #4
    HarrisNC

    HarrisNC New Member

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    It’s smaller height wise than most 285/70/17. It will fit, but it might hang lower depending on your wheel.
     
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  5. Jul 22, 2022 at 1:11 PM
    #5
    Dillusion

    Dillusion New Member

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    285/55/20 should fit. Its smaller than 285/70/17
     
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  6. Jul 22, 2022 at 1:11 PM
    #6
    kmeeg

    kmeeg LionRunner

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    Other than stock sizes I have used;

    275/55R20 Falken Wildpeak - Stock Limited 20in wheels
    285/70R17 Falken Wildpeak - Stock TRD Offroad 17in wheels
    275/70R17 BFG KO2 - Stock TRD Offroad 17in wheels
    285/70R17 BFG KO2 - Stock TRD Offroad 17in wheels

    They are all non KDSS 4Runners if that matters.
     
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  7. Jul 22, 2022 at 2:02 PM
    #7
    4runGirl88

    4runGirl88 [OP] Get a little mud on the tires!

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    Thanks for the wonderful feedback. I definitely want to make sure I've got the same size tire as I have heard that using various sized tires can be trouble. I'm assuming that applies to more long term than brief emergency type situations, but still it'll be more peace of mind.
     
  8. Jul 23, 2022 at 12:36 PM
    #8
    PhantomTweak

    PhantomTweak New Member

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    None. Bone Stock. EXCEPT: Brushguard, tow hitch, both welded to the frame. It's good to have friends and a fully equipped garage!
    It depends on HOW different the tire outer diameters are. A very slight difference, you might be OK for a very short period of driving. A large difference, you're going to have big troubles with differentials and transfer case. Up to and including failure of diff's, or transfer case. Like as in catastrophic failure.

    Your spare should be as close as possible to the size of the in use tires. Regular tire wear is acceptable, as far as size difference, for a short, emergency type use, but even then, the key is SHORT use. Again, we're talking diameter of the tire at the tread. Not so much width of the tire, or diameter of the rim, although they both matter, to a lesser extent, as well. Best is to have the same rim, and a removed "use tire" as a spare.

    4WD drive vehicles, even when in 2WD mode, have unique problems, as far as tire size for spares goes. I use the best of the 4 old tires for a new spare when I put new tires on my vehicles. That way, as the tires slowly wear down, the spare gets closer to matching the rest of the tires. It's worked really well for me so far, and I've owned Toyotas since 1988.

    Good fortune to you!
    Pat☺
     
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  9. Jul 23, 2022 at 2:22 PM
    #9
    4runGirl88

    4runGirl88 [OP] Get a little mud on the tires!

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    Thank you. This is what is on there right now. I've used it once since I bought my rig when an extremely large screw burrowed deeply into the center tread. It might've been me being paranoid, but I swear the truck handled differently (scary different) when I drove it to the tire shop which was about 20 miles from where I was. Thankfully they had my KO2 size in stock and were able to replace right away.

    I've been meaning to get the spare updated for awhile now with current size, but am not certain a 20" wheel and tire is going to fit in the under carriage.
    20220723_141051.jpg
     
  10. Jul 24, 2022 at 11:49 AM
    #10
    PhantomTweak

    PhantomTweak New Member

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    None. Bone Stock. EXCEPT: Brushguard, tow hitch, both welded to the frame. It's good to have friends and a fully equipped garage!
    IMHO, for what it's worth, maybe a decent tape measure would be your best option.Maybe a good set of measurements on the current use tires and wheels, then a set of the spare's area under the truck, and a comparison of the two, would be the best answer to your concerns?

    It's what I would do, anyway...
    Pat☺
     
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