37's on my 2024 zr2 bison 2500hd.

[Hpmaniac]

Just got these nitto 37's installed and so far I can not make them rub in any circumstance! Truck looks so much better now. This is how the truck should of came!!! I did 1 full turn on the front torsion bar just for extra insurance but they didn't rub even before that.

 

[AXE]

Air down to 25 psi and report back with how much rubbing you get on the UCAs.

 

[Hpmaniac]

Air down to 25 psi and report back with how much rubbing you get on the UCAs.

I have a bunch of clearance there now at 40 psi. Is this a issue area? I have atleast 1 inch minimum.

 

[AXE]

I don't know for sure. I put on Toyo MT 37x13.50R18 and it barely cleared the UCA with steering static and full lock. I figured if I dropped down to below 30 psi it would squat and rub and also flex to much in off camber situations. I will run 15 psi in soft sand in the dunes. Sometimes run 30 psi on desert and forest roads when hunting and fishing to smooth out the ride.

I was planning on going to a 0 or -12 offset wheel, but there aren't many options for 8 lug wheels in 18 inch rims. May have to go to 20 inch wheels.

37s definitely look good.on this rig!

 

[Hpmaniac]

Those 13.5 toyos look great but are very wide, they run wider than some other 13.5 tires I've had. A 12.5 is probably the correct size for this truck and not have issues. They should have come with a 37, they look funny imo with a 35.

 

[AXE]

Yeah, part of my objective was a wider stance. With 37s, I like the proportions of the 13.5s. I will likely end up with a wider rim with compatible offset. I really like the Bison wheels, so disappointed to not be able to run them.

 

[Hpmaniac]

AXE, my 2008 duramax with 38's would rub the control arm so I did a 1/4 inch spacer and found a lug stud the was 3/8 inch longer I pressed into the bearing and it fixed my problems.

 

[Kel]

Which Nittos did you go for? There are slight differences in overall diameter.

 

[Hpmaniac]

Ridge grappler,

 

[Hpmaniac]

My new favorite mt is the mickey thompson MT, they balance really good, make very little noise and work awesome. I have them on my TRX and they make less noise than the factory tires did. They also look awesome.

 

[AXE]

I've always liked the Mickey Thompson tires. I've never run them, but if I didn't like Toyos so much, that's what I'd run. I've run a couple sets of Nittos, that were pretty good. They just didn't seem to be as good towing heavy (12-14k lbs) for me. You wouldn't think the Toyo MTs with those big lugs would tow good, but they did. The Toyo RT Trails tow good too. I did a 1600 mile trip at about 12k lbs and I was very happy with them.

 

[BG'sZee]

Just got these nitto 37's installed and so far I can not make them rub in any circumstance! Truck looks so much better now. This is how the truck should of came!!! I did 1 full turn on the front torsion bar just for extra insurance but they didn't rub even before that.View attachment 10189View attachment 10190View attachment 10191View attachment 10193

That is AWESOME!!

 

[BW0311]

Just got these nitto 37's installed and so far I can not make them rub in any circumstance! Truck looks so much better now. This is how the truck should of came!!! I did 1 full turn on the front torsion bar just for extra insurance but they didn't rub even before that.View attachment 10189View attachment 10190View attachment 10191View attachment 10193

Truck and tires look awesome! I'm guessing you leveled the front end?

 

[Hpmaniac]

Truck and tires look awesome! I'm guessing you leveled the front end?

No, I did not level it. Only thing I did was crank bars 1 turn and that didn't really raise the front maybe 1/4 inch. These trucks take a 37 easy with plenty of room. Has to be a 12.5 or you will have issues touching upper control arm.
The 25 or 26 bison will have a 37 according to a gm rep I spoke with.

 

[BKB5]

Looks great!!!

 

[aztechead]

@Hpmaniac , any updates you could provide? I just picked up a Bison today and am looking to swap to 37s!

 

[mwsracerx]

That is AWESOME!!

Great looking truck!

 

[sadZR2]

Just got these nitto 37's installed and so far I can not make them rub in any circumstance! Truck looks so much better now. This is how the truck should of came!!! I did 1 full turn on the front torsion bar just for extra insurance but they didn't rub even before that.View attachment 10189View attachment 10190View attachment 10191View attachment 10193

Were you able to fit a 37" on the spare as well?

 

[sadZR2]

I don't know for sure. I put on Toyo MT 37x13.50R18 and it barely cleared the UCA with steering static and full lock. I figured if I dropped down to below 30 psi it would squat and rub and also flex to much in off camber situations. I will run 15 psi in soft sand in the dunes. Sometimes run 30 psi on desert and forest roads when hunting and fishing to smooth out the ride.

I was planning on going to a 0 or -12 offset wheel, but there aren't many options for 8 lug wheels in 18 inch rims. May have to go to 20 inch wheels.

37s definitely look good.on this rig!

Yea your tires are 14.2 inches wide when inflated to spec. I'm actually surprised its not rubbing right now.

Did you also do a 37" spare?

I'm installing some BFG KO2's 37x13.5 on Thursday. Overall width is supposed to be 12.8 I will report back about fitment. I wouldn't mind running a BORA 3/8 spacer worst case scenario.

The only reason I picked BFG KO2's was due to Triple Peak Snow Rating. We are planning a trip to tahoe and figured it's a good enough reason for a forced upgrade.

 

[AXE]

Yea your tires are 14.2 inches wide when inflated to spec. I'm actually surprised its not rubbing right now.

Did you also do a 37" spare?

I'm installing some BFG KO2's 37x13.5 on Thursday. Overall width is supposed to be 12.8 I will report back about fitment. I wouldn't mind running a BORA 3/8 spacer worst case scenario.

The only reason I picked BFG KO2's was due to Triple Peak Snow Rating. We are planning a trip to tahoe and figured it's a good enough reason for a forced upgrade.

I only did a test fit on mine, I am not running them. There was enough clearance for daily driving, not enough for me to be comfortable offroad

I'm still looking for some wheels I like. A lot of them I like with 0 or negative offset require 20 inch wheels and I wanted to stick with 18.

Toyo AT3s have 3 peak rating too.

A 37 spare will probably fit, but you might have to relocate the heat shield an inch over. You don't really need a 37 spare. You can move the 35 to one of the front corners in 2WD and get where your going.