37” spare tire - list of tires that fit under the bed

[Texops]

The rack is from KB Voodoo
https://www.kbvoodoo.com/shop/jeep-gladiator-hi-rise-crossbars-for-use-with-tonneau-covers

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[Chevy6772]

It’s a no name but well built
https://www.amazon.com/Mild-Steel-Cargo-Carrier-Basket/dp/B06Y4GLGDN

Thanks

 

[aegiscpo]

A 37x12.5x17 Cooper STT Pro on factory granite crystal wheel does fit but only at 25psi or less. I plan to rotate 5 so I think it’ll be fine after one rotation, maybe 2. Seems to be on the large side of the 37’s especially on the stock wheels.

Thanks for the photos, seriously thinking abut the STT, you replaced the steelie with a factory wheel correct? I will be replacing mine with a 17x9 so I think I should be good to go as well, or at least I hope anyways.

 

[CTFriel]

Thanks for the photos, seriously thinking abut the STT, you replaced the steelie with a factory wheel correct? I will be replacing mine with a 17x9 so I think I should be good to go as well, or at least I hope anyways.

That’s correct I replaced with a factory wheel and it fit.... barely.

 

[aegiscpo]

That’s correct I replaced with a factory wheel and it fit.... barely.

Yeah it looked very snug... I got some time before I get tires, so I will consider this, like the idea of a five tire rotation, but if I just find a 37" used I could save on the cost of one wheel and tire... and use the spare as just that a spare... Options Options, its always something... LOL

 

[xs2k]

Does the 37s (that do fit) move around when offroading since it's heavier than stock?

 

[Phred]

37” Wildpeak MT fits aired down to 18psi on the stock rim

 

[Phljeeper]

I fit a 37x12.5R17 Milestar Patagonia on the stock steelie under mine. It was tight and I did air it down to about 30 but doesn’t hit anything and works well.

 

[aegiscpo]

Curious to know if anyone has noticed any damage to a matching wheel that is kept under the truck and rotated in. I am about to purchase new wheels and stuck on 4 with the steel spare or 5 matching wheels and rotate it in. Just wondering if anyone has noticed rash/rubbing damage from being kept winched up under the bed. Thanks.

 

[Phljeeper]

Curious to know if anyone has noticed any damage to a matching wheel that is kept under the truck and rotated in. I am about to purchase new wheels and stuck on 4 with the steel spare or 5 matching wheels and rotate it in. Just wondering if anyone has noticed rash/rubbing damage from being kept winched up under the bed. Thanks.

Mine is banged up from wheeling trips on rocks. I wouldn’t want to rotate it in. It’s there for emergency only for me. I also wouldn’t want a nice wheel down there.

 

[Like_coffee]

My Razr spare does not fit fully. I have it shoved up there best it will go.

Weird. I'm about to get an oil change and rotation in a the next few weeks. I'll see if the dealership can handle the spare rotation. The tire shop that mounted mine originally said it was a bit tough but the spare is still tucked up there right now.

 

[WhatExit?]

Updated list of 37’s that Fit

• BFG A/T KO2
  • 36.5" diameter x 12.5" wide
• Maxxis Razr MT
  • 36.8" diameter x 13.1" wide (17x9.5" wheel)
• Cooper Discoverer STT Pro
  • 36.77 x 13.0" wide
• BFG T/A KM2 MT
  • 36.8" x 12.5" wide
• 37” Wildpeak MT
  • Fits aired down to 18psi on the stock rim
• Kanati Trail Hog MT 36.7" x ? (didn't find width online)
• Milestar Patagonia
  • 36.8" x 12.50" wide on AEV Borah 17 x 8.5 wheel
  • 37x12.50R17 Milestar Patagonia on the stock steelie under mine. It was tight and I did air it down to about 30 but doesn’t hit anything and works well.
• Nitto Trail Grappler
  • 36.85" x 13.43" wide – “very tight but it fits”
    
    • https://www.jeepgladiatorforum.com/forum/threads/37”-spare-tire-list-of-tires-that-fit.24091/post-480741
• Gladiator Xcomp M/T
  • 37x13.50-17 (well-used tire) on an 8.5” KMC wheel (removed resonator and heat shield too)
    
    • https://www.jeepgladiatorforum.com/forum/threads/37”-spare-tire-list-of-tires-that-fit.24091/post-483530
• Achilles Desert Hawk XMT
  • 37x12.5x17– “fits barely – had to pull the heat shield and pull it against the receiver while cranking it into place
    
    • https://www.jeepgladiatorforum.com/forum/threads/37”-spare-tire-list-of-tires-that-fit.24091/post-494970
• Patagonia
  • 37x12.5-17 on Method 701 wheel – fits with 35 psi wit a little wigglng – about ¼” from rear trackbar
    
    • https://www.jeepgladiatorforum.com/forum/threads/37”-spare-tire-list-of-tires-that-fit.24091/post-499676
• Falken Wildpeak AT3W
  • 37x12.50-17 fits but Gladiator does NOT have two hitch receiver
    
    • https://www.jeepgladiatorforum.com/forum/threads/37”-spare-tire-list-of-tires-that-fit.24091/post-515819
• Nitto Ridge Grappler
  • 37.12.50-17 (see below "doesn't fit") on KMC XD Brute 17” wheel – fits with less than 1/8”
    
    • https://www.jeepgladiatorforum.com/forum/threads/37”-spare-tire-list-of-tires-that-fit.24091/post-543306

37’s that Don’t Fit

• General Grabber X3
  • 36.8" x 12.5"
• Goodyear Wrangler MT/R Kevlar
  • 36.8" x 12.5" wide - Aired down to 0 psi with or without the heat shield, it firmly hits the hitch and trackbar
• Toyo Open Country R/T
  • 36.8" x 12.5" wide
• Nitto Ridge Grappler
  • 37”x? -17 on Method 701 wheel – aired down to 18psi didn’t fit – not enough room between hitch and trackbar
  • https://www.jeepgladiatorforum.com/forum/threads/37”-spare-tire-list-of-tires-that-fit.24091/post-530389

 

[RidinDirty]

Nitto Trail Grappler 37" on stock spare tire rim fits underneath.

 

[BrandonG]

Has anyone tried a 37 on the stock steel spare rim while driving . Off road or on would it not rub without the back spacing Of a aftermarket wheel ??

 

[Chris Lambeth]

So consensus is that if you go off-road even a little do not put a good wheel down there with any size tire?

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