37 inch vs my 33 inch. Same tire weight. Does Tire weight or Tire size matter more?

[GladiatorPilot23]

yes, but by unmounted i mean not on a wheel either. tho i use a laser level cus i'm fancy. max psi would definitely bow tire to exceed the stated height. by like maybe a 1/4in?

lol I wonder if if anybody called BFGoodrich and say, why are you publishing fault information. Shows how you got to the 36 1/2 inch spec listed.

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[PuddleJumper]

lol I wonder if if anybody called BFGoodrich and say, why are you publishing fault information. Shows how you got to the 36 1/2 inch spec listed.

i think its just standardized sizing. there is no 36x12.5 slot allowed for DOT somethin or another. so they make a tire and its bigger than 35. classes as a 37 automatically then. same with width, no one is actually dead on 12.5 or 13.5 or any other number. metric tires have more stringent requirements. standard size not so much. I watched a dude grenade his diff cus he got a cheap milestar as a spare for his 35s. his 4 35s measured 34.2, the milestar measures a whole inch and half taller. 5 miles down pavement and boom.

 

[GladiatorPilot23]

IDK how true this is in your case, but these are two major factors I encountered when choosing my tires For the ‘24 Easter Jeep Safari:

- My insurance guy is a Jeeper, and he informed me that putting 37s on my stock rims would be enough to void any warranty claims if the adjuster noticed. He strongly encouraged me to either get 35s, or do the thousands-worth of other mods necessary for 37s… so, I went with 35s.

- In choosing 35s, I was informed that “only Nitto Ridge Grapplers are warrantied for ‘said’ rim size,” so if there was any manufacturer defect, I’d either want Ridge Grapplers or a different wheel. (I should note that, at the time of purchase, the Ridge Grappler had been discontinued, and he didn’t yet have specs, in this regard, on the newer version: Recon Grapplers.)

As for the weight and stiffness… I don’t notice, but my mpgs dropped from around 18 to around 16 for daily driving (at 45psi). The one thing I did notice right away is that the 35s DO rub when I turn the wheel a seemingly-natural rotation. I quickly adjusted to make wider turns, so I don’t notice that any more unless I let someone else drive, but I’d imagine you would need to make even wider turns with 37s and no other mods.

As for the performance off-road… I’m in an “otherwise-stock” JT Rubicon, and I was fortunate enough to be the very-front vehicle (behind the Leader) for Porcupine Rim Trail all the way up until the lunch break. We had several prolonged rests before then, and then - right before lunch - the Leader walked up to me and asked if it’s okay to let another vehicle in front of us. I agreed, and after lunch I quickly figured out why they did that. It was a bone-stock JT Rubicon that couldn’t traverse the ledges without a tow strap (See ‘Yellow’ pic). It really made me value my purchase, as I had a little belly rub but never even worried about getting stuck.

So… IMO… go with 35s unless you’re definitely needing 37s and are ready to invest; but, what do I know, really? I’m just a newbie recycling info here.

Is your Ridge Grappler 11.5" width? If larger on stock wheel ,then in any accident you saying the issuance will not cover accident even if the tire width was not the cause?

 

[GladiatorPilot23]

some 37s are stated to fit 7.5 in wide rims. but you are right, if you put a tire on a rim size not stated by the manufacturer for use. definitely can cause insurance problems. Thats why i wnet mickey thompson, they state 17x7.5 wheel is a size spec'd for their 37x12.5. Its also an A/T with all the DOT approved goodies that most MTs won't come with. I've seen guys declared at fault for driving on stock size tires but no snow or ice rating (summer tires) while driving in snow and getting in a wreck. so there's a bit more to it than just tire size. as far as fitment, i crammed 37s on my stcok mojave with no lift and had no rubbing. I also did this on stock sport wheels (same factory offset as a rubicon) but added a 1in spacer to get around +20 offset. Jeeps come with massive wells, and its mind boggling to me when people ask if they can fit 35s or down. I came from Toyotas where you actually had to cut pieces of your frame off to fit true 33s. and 35s well, you ain't gonna be stock ever again, thats for sure. The rubicon is the only trim one should worry about with true 37in tires and no lift. because it can disconnect its swaybars, it can articulate much farther than a Mojave or sport. And that's where you start running into your rapid fender delete issue. personally I think 2in is excessive lift for anything but true 37s and larger. I'd do a fender chop rather than jack up my center of gravity if i wanted to tuck my 37s after getting a swaybar disconnect. Now outside the Mojave and Rubi, everyone else gets standard fenders which sit much lower. with that you can still get 37s on but only select ones and this is under the pretense of no swaybar disconnect. a BFG KO2 runs small for a 37 and would fit relatively easy. The point to all this, proper fitment requires proper offset/backspacing, and CAN require lift and bumpstops. If your rubbing on 35s, its most likely the plastic liner. you can either ziptie it tight to the frame and/or run a bit more offset. but i would recommend a lift of 1in or greater if you go 37s just cus your rubi has sway bar disconnect and can cycle a wheel that far up. hope this helps

It looks the the spec on MT site changed. They now spec the 37x12.5 to 8" rims. Does that mean you have to change it ?

 

[PuddleJumper]

It looks the the spec on MT site changed. They now spec the 37x12.5 to 8" rims. Does that mean you have to change it ?

no, thats an MEAS number. Its recommended but not law. Thats rim range required to measure true dimension as stated by the manufacturer for intended use. I forget what the "law" code name is but I know Discount tire uses it. And it states 7.5 - 11.5 as the min/max for wheel width on the Baja Boss A/T. Much larger range than the 8-11 MT states. ideally MT wants you to mount on a 10in rim for optimal performance. Usually a shop won't mount tires on wheels outside the lawfully required range. Thats why stretched tires require you to know somebody or have your own mounting machine.

 

[GladiatorPilot23]

no, thats an MEAS number. Its recommended but not law. Thats rim range required to measure true dimension as stated by the manufacturer for intended use. I forget what the "law" code name is but I know Discount tire uses it. And it states 7.5 - 11.5 as the min/max for wheel width on the Baja Boss A/T. Much larger range than the 8-11 MT states. ideally MT wants you to mount on a 10in rim for optimal performance. Usually a shop won't mount tires on wheels outside the lawfully required range. Thats why stretched tires require you to know somebody or have your own mounting machine.

It says MEAS on the site 8-11" Take a loook.

https://www.mickeythompsontires.com/light-truck-tires/baja-boss-a-t

Discount Tire . com went to Americas Tires . com and yes they show 7.5-11.5" BUT Also other tires that are 37x12.5x17" are also showing the 7.5"-11.5".

https://www.americastire.com/buy-tires/mickey-thompson-baja-boss-a-t/p/100897

Here is Tire Rack which is part of the Americas Tire and Discount Tire. They are specking the same as the manufacture which shows 8-11"

https://www.tirerack.com/tires/tires.jsp?tireMake=Mickey+Thompson&tireModel=Baja+Boss+A/T&partnum=725QR7BBAT&vehicleSearch=false&fromCompare1=yes


It would mean Americas Tire has not update thier site. The insurance would go with the manufacture on this.

 

[PuddleJumper]

It says MEAS on the site 8-11" Take a loook.

https://www.mickeythompsontires.com/light-truck-tires/baja-boss-a-t

Discount Tire . com went to Americas Tires . com and yes they show 7.5-11.5" BUT Also other tires that are 37x12.5x17" are also showing the 7.5"-11.5".

https://www.americastire.com/buy-tires/mickey-thompson-baja-boss-a-t/p/100897

Here is Tire Rack which is part of the Americas Tire and Discount Tire. They are specking the same as the manufacture which shows 8-11"

https://www.tirerack.com/tires/tires.jsp?tireMake=Mickey+Thompson&tireModel=Baja+Boss+A/T&partnum=725QR7BBAT&vehicleSearch=false&fromCompare1=yes


It would be Americas Tire has to update there site. The insurance would go with the manufacture on this.

Yeah I looked per your original comment. MEAS isn’t law though. It’s a standard/ recommendation. Just like no one will go after BFG for running small, no one is gonna after me for running min or a half in small. It’s not a set in stone rule. Most that could happen is MT could deny my 50k warranty cus I didn’t use thier recommended wheel specs. DOT only seems to care about tread depth and a DOT rating. Which leaves it up to local law for more rules to enforce should they so choose. Surprisingly I can’t find anything in VA concerning running a wide tire on a thin wheel. Plenty against stretched tires tho. All though my wheels spacer are the no no. Pretty sure wheels spacer or “offroad use only” regardless of state.

 

[Discount Tire]

no, thats an MEAS number. Its recommended but not law. Thats rim range required to measure true dimension as stated by the manufacturer for intended use. I forget what the "law" code name is but I know Discount tire uses it. And it states 7.5 - 11.5 as the min/max for wheel width on the Baja Boss A/T. Much larger range than the 8-11 MT states. ideally MT wants you to mount on a 10in rim for optimal performance. Usually a shop won't mount tires on wheels outside the lawfully required range. Thats why stretched tires require you to know somebody or have your own mounting machine.

It says MEAS on the site 8-11" Take a loook.

https://www.mickeythompsontires.com/light-truck-tires/baja-boss-a-t

Discount Tire . com went to Americas Tires . com and yes they show 7.5-11.5" BUT Also other tires that are 37x12.5x17" are also showing the 7.5"-11.5".

https://www.americastire.com/buy-tires/mickey-thompson-baja-boss-a-t/p/100897

Here is Tire Rack which is part of the Americas Tire and Discount Tire. They are specking the same as the manufacture which shows 8-11"

https://www.tirerack.com/tires/tires.jsp?tireMake=Mickey+Thompson&tireModel=Baja+Boss+A/T&partnum=725QR7BBAT&vehicleSearch=false&fromCompare1=yes


It would mean Americas Tire has not update thier site. The insurance would go with the manufacture on this.

Our stores follow the USTRA guidelines which state a 37x12.50R17 is safe to be mounted on a 7.5" wide wheel. With that said it is the very minimum safe wheel width so the ride, handling, or tire wear could be effected compared to if they were mounted on a wheel that is closer to the middle of the recommended wheel fitment.

 

[PuddleJumper]

Our stores follow the USTRA guidelines which state a 37x12.50R17 is safe to be mounted on a 7.5" wide wheel. With that said it is the very minimum safe wheel width so the ride, handling, or tire wear could be effected compared to if they were mounted on a wheel that is closer to the middle of the recommended wheel fitment.

WHAT HE SAID! @Discount Tire always got thier customers like that. Y’all real ones.

 

[bleda2002]

Is your Ridge Grappler 11.5" width? If larger on stock wheel ,then in any accident you saying the issuance will not cover accident even if the tire width was not the cause?

Of course you will be covered. They would need to prove something blatantly negligent on your part and illegal to deny your claim which a 12.5 inch tire on a 7.5 rim is not.

 

[GladiatorPilot23]

Our stores follow the USTRA guidelines which state a 37x12.50R17 is safe to be mounted on a 7.5" wide wheel. With that said it is the very minimum safe wheel width so the ride, handling, or tire wear could be effected compared to if they were mounted on a wheel that is closer to the middle of the recommended wheel fitment.

That’s good to hear. I checked out the USTMA website.

Our stores follow the USTRA guidelines which state a 37x12.50R17 is safe to be mounted on a 7.5" wide wheel. With that said it is the very minimum safe wheel width so the ride, handling, or tire wear could be effected compared to if they were mounted on a wheel that is closer to the middle of the recommended wheel fitment.

That’s good to hear. I was checking out the USTMA website to read about the guidelines, but wasn’t able to find it. It’s probably buried somewhere in all those PDFs. There’s a lot of information there. How come Tire Rack a subsidiary, doesn’t update the website with the correct size guidelines? Wish the manufacturer also did the same. I want to badly run a BFG K03 because it’s the lightest AT when it comes out and would prefer 37x11.5” but would go for the 12.5” on the stock wheels.

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