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Discussion Starter · #1 ·
I plan on swapping to 37” tires on day one. Alopen1 already confirmed they will fit and gave us the code for the programming in his only post on this forum.

Load Range E 37” tires are rare. I would prefer an America tire company, but there aren’t any options available that I can find. The only two brands I am considering that carry them are BF Goodrich (French) KM3s or General Grabber (German) X3s. Both solid options. Does anyone else have any experience with other tires that come in Load Range E 37”?
 

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Discussion Starter · #3 · (Edited)
Here is his post:

Hey, Hummer Chat community. This is Al Oppenheiser, the HummerEV Chief Engineer. To answer your questions, the HummerEV will accommodate 37" Tires with no vehicle modifications required (meaning you won't need a mallet to 'persuade' any metal parts. We do not offer a 37" tire in the HummerEV order guide, but many/most GMC dealers should have some 37's on display in their showroom and for you to purchase after your order arrives. You can also pick an aftermarket 37" if you prefer. We do sell the cal (RPO RWQ) you can get from your dealer/service, and they will track the warranty you would get for anything going wrong related to the cal, since it is a GM release. Enjoy the 37's!
Nothing about the stock tire being offered in a larger size unfortunately because that is what I would prefer.
 

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Here is his post:


Nothing about the stock tire being offered in a larger size unfortunately because that is what I would prefer.
17" and especially 20" wheels have quite a few more available load range E 37s. The 18s are a limiting factor here (as well as general tire unavailability these days).

KM3 and X3 are more aggressive mud tires which is more likely to impact range than the AT tires (with Ridge Grapplers considered in between the two, a hybrid tire). Stock tires, for reference, are 305/70R18 at 62 lbs.

Tire (37 x 12.5 R 18)Weight
Nitto Ridge Grappler80
Nitto Terra Grappler76
Toyo Open Country A/T III72
Falken Wildpeak AT3W80
BFG KM375
Grabber X380

The BFG KO2 is available starting in May (per America's Tire), supposedly, as well, but in a 13.5 - don't know whether they'll fit or be too wide for the Hummer. Listed at 78 lbs and always a popular tread pattern.
 

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Discussion Starter · #5 · (Edited)
I really appreciate your response and putting that table together. The KM3 and X3 are aggressive mud terrains. I figured it wouldn’t be too much different than the mud terrain “Territory MT” the Hummer comes with. I am not a Nitto fan on heavier vehicles. They just wear out way too quick on diesel trucks compared to others.

Last I checked, Goodyear doesn’t even have the Territory MT in Hummer size available on their website yet. Hopefully when they do, a 37” option shows up also. I have a Fall 2022 delivery, so there is time…
 

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You don't want a MT on a vehicle this heavy with this much power. You will HATE the noise and the lifespan of the tires. Take it from a 3/4 truck owner who runs them.

Buy a Nitto... Stay away from a Toyo.

I run Nitto Ridge grapplers and/or Kenda Klever RT
I have sound measuring equipment, I'll have to pull it out when I get my truck back from the dealer and take some actual measurements. The Hummer is quieter than I expected at highway speeds. I'll also have to see if it's a different experience for passengers. Once we are in warmer weather I can do the same thing with windows down and top off.
 

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Discussion Starter · #10 ·
You don't want a MT on a vehicle this heavy with this much power. You will HATE the noise and the lifespan of the tires. Take it from a 3/4 truck owner who runs them.

Buy a Nitto... Stay away from a Toyo.

I run Nitto Ridge grapplers and/or Kenda Klever RT
I appreciate your response but Nitto and Klever aren’t brands I am willing to consider.
 

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Discussion Starter · #12 · (Edited)
You are the first HD (I assume diesel) owner to recommend Nitto. Everyone else says they wear out very fast from the added weight. I have heard many recommend Toyo which surprises me that you don’t like them. I ran Toyo on my Cummins and they were fine.

i don’t know anyone with Klever tires and have never seen them on ANY top ten tire list. I am not willing to drop that far into obscure brands.
 

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You are the first HD (I assume diesel) owner to recommend Nitto. Everyone else says they wear out very fast from the added weight. I have heard many recommend Toyo which surprises me that you don’t like them. I ran Toyo on my Cummins and they were fine.

i don’t know anyone with Klever tires and have never seen them on ANY top ten tire list. I am not willing to drop that far into obscure brands.
Kenda is the tire. Not klever and they aren’t obscure. At least not here.
You’re right that 5-10 years ago everyone wanted to go but I can tell you from experience that in the past few years the leifespans have gone down dramatically. We used to get 50k miles out of Toyo tires and the last 2 sets I have made it less than 25k. Same driving conditions. That’s not a one off set on me either. We’ve had 12+ sets in the last 7 years between us and I won’t buy another.

I have 15k miles on my Kendra’s and they are probably 80%. My dad has 20k miles on his nitros and they are probably 75% but his truck is almost 10k lbs
 

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You don't want a MT on a vehicle this heavy with this much power. You will HATE the noise and the lifespan of the tires. Take it from a 3/4 truck owner who runs them.

Buy a Nitto... Stay away from a Toyo.

I run Nitto Ridge grapplers and/or Kenda Klever RT
I have a Silverado 2500 and ran the BF Ko's for a long time and my tire guy told me that he was having issues with them (they weren't completely round and he couldn't get them balanced and BF was replacing them but problems)... I went to the Nito Ridge Grapplers on his recommendation and I have had really good wear out of them... It was mostly highway miles so that may help with the wear.
 

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Thanks for this thread, I've been bouncing around, watching reviews, talking to people I know, etc., and kinda down to either the Toyo Open Country or Nitto Ridge Grappler. Almost any recent video I've seen that is from a dealer perspective, they all say Nitto. A lot of video reviews I'm seeing from truck owners have had both, say Nitto. Every friend I have that runs Toyo but hasn't had Nittos say Toyo, the one friend I have that has a set of the Nitto Ridge Grapplers says Nitto. So basically I'm no help and this post has just wasted everyone's time. You're welcome.
 

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Thanks for this thread, I've been bouncing around, watching reviews, talking to people I know, etc., and kinda down to either the Toyo Open Country or Nitto Ridge Grappler. Almost any recent video I've seen that is from a dealer perspective, they all say Nitto. A lot of video reviews I'm seeing from truck owners have had both, say Nitto. Every friend I have that runs Toyo but hasn't had Nittos say Toyo, the one friend I have that has a set of the Nitto Ridge Grapplers says Nitto. So basically I'm no help and this post has just wasted everyone's time. You're welcome.
Plus they're made in the same factory by the same people at the same company, right? :)

I think we can all agree the Ridge Grapplers are cooler looking though.
 

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Thanks for this thread, I've been bouncing around, watching reviews, talking to people I know, etc., and kinda down to either the Toyo Open Country or Nitto Ridge Grappler. Almost any recent video I've seen that is from a dealer perspective, they all say Nitto. A lot of video reviews I'm seeing from truck owners have had both, say Nitto. Every friend I have that runs Toyo but hasn't had Nittos say Toyo, the one friend I have that has a set of the Nitto Ridge Grapplers says Nitto. So basically I'm no help and this post has just wasted everyone's time. You're welcome.
We do a lot of lifting and leveling here. We always use the Nitto Ridge Grapplers on our HD builds. We have had no complaints and good longevity out of the tires. That's our go to tire for sure.
 
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