37's on my 2024 zr2 bison 2500hd.

[AXE]

Great info , gents. Thanks for the insight.

We are picking up our ZR2 HD DMax on the 9th, then moving back out to Montana from Florida. A 3 Peak tire is a must for us. I've heard a lot of great things about the new Goodyear Boulder MT's (link here). Ill drive the truck out on there OE's but will switch them out for the Boulder MT's once we are settled. They don't offer a the 37's in an 18" wheel option or 13.50" wide option for the 20" wheel. So, 37x12.50r20 is what I'll go with. Ive had the Falken WP AT3W's in the past and loved them but these Goodyears seem to be some of the best 3 peak tires from what I've heard across multiple forums.

Has anyone aired down or articulated the suspension to find any rub points on the non-Bison ZR2 with 37x12.50's? As @AXE mentioned the 0 to -12mm offset will help but I don't want to go with more of a negative offset than I have to.

Thanks for the help.

I was able to find out the stock Bison wheels were +33, I'm sure they all are the same. That means if you went to a +12 or 0 offset, you'd probably get the clearance you need on the UCAs. Your aftermarket wheels could negate some of that if they are wider, as will the tires and heavy shoulder lugs. The only real way to know is test fit one. If you can find someone willing to mount a tire on a rim and then to the truck you'd know. Most won't don't that unless you buy them.

 

[Greyzr2]

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 sick!

 

[Hpmaniac]

Update, I now have 9k miles on the truck, tires have never rubbed once anywhere! Also milage has really started to get much better on truck. Recent trip to lake Havasu to purchase a boat, average unloaded driving between 68and 82 mph was 18.9 u loaded with the 37's. Towing back average for 1400 miles was 15.8. Truck now unloaded driving 65 to 68 will average 22.6 driving with cruise. I have not checked milage yet with the stealth module. BTW truck has s&b airbox.