37" Tire Regrets?

[Jeff-Ohio]

Just had Geiser and Deaver+3 springs installed, so I am now looking at 37" tires. Is there anybody out there that regretting jumping from a 35" tire to 37s? I am also closely looking at the weight of the 37" tires and worried about some highly rated tires (Nitto Ridge Grappler, Toyo Open Country RT) because they weigh about 10 pounds more than the KO2s. I have an MPT tune and would not consider myself a speed demon, but I also do not want the truck to start driving like stock again. The Goodyear Wrangler MT/R is less than two pounds heavier than the KO2s, so I am considering them, but not sure how well they will wear, sound, and perform for mostly street use. Thoughts?

 

[xrocket21]

Consider your spare when going to 37's.... I rarely see that mentioned

 

[Jeff-Ohio]

Consider your spare when going to 37's.... I rarely see that mentioned

Good point. Is it possible to easily fit a 37" tire in the spare tire location? I'm assuming the answer is no. If that is the case, how bad would it be if I kept the 35" tire as a spare and only used it in an emergency just to get to a tire shop? Is that a definite "don't do"? If fitting a 37" tire under the truck and/or using a 35" tire in an emergency situation is not possible, then I might just remove the spare all together and just call a tow truck if something happens.

 

[zombiekiller]

you'll find that a 37" spare, under the bed, is a little counterproductive as it rubs on the differential cover.

if you drive your truck hard offroad, the only tires you have a shot of fitting without rubbing are the bfgs.

 

[Jeff-Ohio]

you'll find that a 37" spare, under the bed, is a little counterproductive as it rubs on the differential cover.

if you drive your truck hard offroad, the only tires you have a shot of fitting without rubbing are the bfgs.

Thanks. I will keep the 35" as a spare and obviously only use it in an emergency situation for a very short period of time. Hopefully that won't cause any major drive train issues.

 

[Edbert]

Hopefully that won't cause any major drive train issues.

It should not, replacing a trashed differential is not THAT major.

 

[Sano Dano]

On my third set of 37's, 2011 with 130,000 miles, 30K off road...…. No regrets, the only thing I feel is needed for off road use is for lower gearing!

 

[03'Darin]

Just FYI the rear diff is open (unless you have the locker on) so no damage would be done there with a 37 and a 35 on the rear. You would want to turn the traction control off if you used the spare. Because with the varied rotation speed of that one tire the truck may think that's wheel spin and apply brake to that wheel.

If I remember correctly you have the 802A package so your front diff is a Torsen. This could be an issue with 2 different tires. He is the explanation of how the Torsen diff works:

"The locking differential is useful for serious off-road vehicles. ... The Torsen (from Torque Sensing) works as an open differential when the amount of torque going to each wheel is equal. As soon as one wheel starts to lose traction, the difference in torque causes the gears in the Torsen differential to bind together."

 

[mmayo]

not sure what size wheel you're wanting to use but the LT325/60R20 Nitto Ridge Grappler is just under 70lbs, 11lbs lighter than the 37". It's listed @ 35.35" while the 37" is listed at 36.77"

This is the Tire Apollo Optics is running & what I've considered if I go w/ the +3 Deavers

 

[Jeff-Ohio]

not sure what size wheel you're wanting to use but the LT325/60R20 Nitto Ridge Grappler is just under 70lbs, 11lbs lighter than the 37". It's listed @ 35.35" while the 37" is listed at 36.77"

This is the Tire Apollo Optics is running & what I've considered if I go w/ the +3 Deavers

Thanks for the info. I really want the extra tire height, so I am planning on going with the 37" tire. I am curious as to how much of a performance effect the larger tire will have on it's own and then what impact the extra weight will have on top of that.

 

[DEGBTI]

pretty much every car sold has a spare tire smaller than stock. They are used to get you home or the local tire shop. I dont see the difference with the Raptor.

I run bfg 37"s on my 2018. They are km2's. The look is amazing, but my next tire will be ko2's. They are lighter and a tad smaller. Do not run a toyo/nito 37. They weigh a ton and you can feel it big time. my 2 cents

 

[Jeff-Ohio]

pretty much every car sold has a spare tire smaller than stock. They are used to get you home or the local tire shop. I dont see the difference with the Raptor.

I run bfg 37"s on my 2018. They are km2's. The look is amazing, but my next tire will be ko2's. They are lighter and a tad smaller. Do not run a toyo/nito 37. They weigh a ton and you can feel it big time. my 2 cents

I really appreciate the input. I have done a ton of research over the past day or two and came to the conclusion that the KO2 is probably the best option due to weight, ride characteristics, longevity, etc..., but just wanted to confirm.

 

[sfadchi]

pretty much every car sold has a spare tire smaller than stock. They are used to get you home or the local tire shop. I dont see the difference with the Raptor.

I run bfg 37"s on my 2018. They are km2's. The look is amazing, but my next tire will be ko2's. They are lighter and a tad smaller. Do not run a toyo/nito 37. They weigh a ton and you can feel it big time. my 2 cents

Pics of your set up?

 

[xrocket21]

pretty much every car sold has a spare tire smaller than stock. They are used to get you home or the local tire shop. I dont see the difference with the Raptor.

I run bfg 37"s on my 2018. They are km2's. The look is amazing, but my next tire will be ko2's. They are lighter and a tad smaller. Do not run a toyo/nito 37. They weigh a ton and you can feel it big time. my 2 cents

any vehicle with awd, locking diffs, LSD, etc will not be happy with mismatched tires.

I would not run a mismatched tire on the front of my raptor with the torsen diff.

I had a Subaru with somewhat different sized tires, and I never carried a spare because I wouldn't run it anyway, for fear of damaging the drivetrain.

Even on an open diff vehicle, I wouldn't drive very far on a mismatched tire.

 

[jabroni619]

Just FYI the rear diff is open (unless you have the locker on) so no damage would be done there with a 37 and a 35 on the rear. You would want to turn the traction control off if you used the spare. Because with the varied rotation speed of that one tire the truck may think that's wheel spin and apply brake to that wheel.

If I remember correctly you have the 802A package so your front diff is a Torsen. This could be an issue with 2 different tires. He is the explanation of how the Torsen diff works:

"The locking differential is useful for serious off-road vehicles. ... The Torsen (from Torque Sensing) works as an open differential when the amount of torque going to each wheel is equal. As soon as one wheel starts to lose traction, the difference in torque causes the gears in the Torsen differential to bind together."

Yep and you can also disengage 4wd/4auto all together and keep it in 2H which unlocks the front hubs. Stick the mismatched tire on the front and you'll be good.

 

[Jeff-Ohio]

Just FYI the rear diff is open (unless you have the locker on) so no damage would be done there with a 37 and a 35 on the rear. You would want to turn the traction control off if you used the spare. Because with the varied rotation speed of that one tire the truck may think that's wheel spin and apply brake to that wheel.

If I remember correctly you have the 802A package so your front diff is a Torsen. This could be an issue with 2 different tires. He is the explanation of how the Torsen diff works:

"The locking differential is useful for serious off-road vehicles. ... The Torsen (from Torque Sensing) works as an open differential when the amount of torque going to each wheel is equal. As soon as one wheel starts to lose traction, the difference in torque causes the gears in the Torsen differential to bind together."

 

[Rusty Deavers]

Stick with a lighter-than-stock wheel and the 37” BFG KO2 and the weight penalty will be minimal.

I had 35” Toyo MT on my last truck. The tires were amazing quality wise, but the weight penalty is HUGE.

As a frame of reference, when I returned from Raptor Assault, my own truck felt quicker on 37s with the tune than the Raptor Assault truck I drove. Granted, their trucks are seeing some severe service.

Also consider that if you're not thrilled you could always change your axle ratio later to offset the change in final drive ratio from taller tires.

 

[jabroni619]

any vehicle with awd, locking diffs, LSD, etc will not be happy with mismatched tires.

I would not run a mismatched tire on the front of my raptor with the torsen diff.

I had a Subaru with somewhat different sized tires, and I never carried a spare because I wouldn't run it anyway, for fear of damaging the drivetrain.

Even on an open diff vehicle, I wouldn't drive very far on a mismatched tire.

You can safely run a mismatched tire up front if you're in 2H. 2H unlocks the front hubs which means the wheels rotate freely, independent of what type of diff is up front.

 

[jaz13]

any vehicle with awd, locking diffs, LSD, etc will not be happy with mismatched tires.

I would not run a mismatched tire on the front of my raptor with the torsen diff.

I had a Subaru with somewhat different sized tires, and I never carried a spare because I wouldn't run it anyway, for fear of damaging the drivetrain.

Even on an open diff vehicle, I wouldn't drive very far on a mismatched tire.

Do you also only drive your vehicles in a straight line? Turning an 4WD vehicle is far more stressful on the drivetrain than 6% difference in tire size.

 

[Crash33]

I had 37' Nittos and they looked awesome, but some performance was lost and they felt heavy. I had no rubbing issues on mid-perch and factory wheels. I wouldn't say I beat the crap out of my truck, but I've definitely done some fast runs over whoops and had air under the tires without issues. I went back to 35's because I got some BFG's cheap and I got the performance back, but I have a set of 37's waiting to go on again sitting in the garage.