Just got my Nitto Terra Grapplers put on 2 days ago. And boy what a difference from the Perelli Scorpion str tires I had. Look 100 times better and have great traction in the snow and mud! Alright here's my set up in case any one else is still in question about lift tire size etc....
2011 Fx4 5.0 3.73 E Locker. 2 1/2" front auto spring spacers and 3" rear auto spring block ( 1 1/2" of lift because it replaces your stock 1 1/2" ish block). 295/60/20 Nitto Terra Grapplers on stock 20" Fx4 rims. Load range E running 80 psi. My milage dropped about 1 mpg with out a tuner. A tuner that would be my next investment along with probably a Solo Mach X exhaust. For those of who are wondering if they will rub if you follow the same set up. Yes they will just touch the upper control arm and full lock. Also if you have mud flaps make sure they are tightly secured to the wheel well and not flip flopping around. I also trimmed about a 1/2 off the corners of the lower plastic valance it did not rub there but it was awfully close I decided to for my own comfort of it not catching a tire and getting ripped off in an extreme situation. I don't know if many will care So much about the whole write up but I figured it might help answer some of the same questions I had when I was doing all my research. So hopefully people will search Lol .

 

Why? That is likely the max PSI for those tires. No way you should be running that in there unless you are doing serious hauling. When just driving around, 35-45 PSI is optimal.

The setup looks great though

 

It is the max for the tires. and I run 80 because I do a lot of hauling.

 

Thanks by the way I like it and the picture I got right now doesn't do it justice I'll have to get a better one when the weather gets better

 

Looks good! 80 psi? That must give one heck of a harsh ride.

 

A wee bit harsh but I usually have a bed full of tools and materials or pulling a trailer. So often to the point its not worth lowering and raising the pressure every other day. On my last truck I had a set of 315/70/16 cooper s/t and I ran them around 50 psi (rated for 80 psi max) cause I wasn't using the truck as much but you can definitely notice the diffrence in rides

 

Holy frijoles! You must be towing some SUPER heavy stuff, no? How heavy is yer trailer when loaded?

Honestly, I don't think there's any way in the world that you need 80 psi. IIRC, that's the maximum for these tires anyway.

I can't imagine yer pulling stuff with a half ton truck that would justify running the max psi fer them tahrs. I ran 42 psi on my set of Terra Grapplers, and was able to haul anything a half ton needs to be hauling.

I'm afraid all you'll do here is prematurely wear the middle of the tread down...all while feelin' like yer a-drivin' a lawg wagon!

The good news is they DO look great!

 

When I'm moving tractors normally between 7000-8500 depending on which ones. Dump trailer most I'll put in it is between 2 and 2 1/2 tons on gravel top soil etc.... and the dump trailer is pretty heavy its self but I would say the car hauler with the tractors is heavier but I don't move that nearly as often as I use the dump trailer. I'll drop my pressure to 50 and see how it feels thanks for the tips guys.

 

Prolly the heaviest load I've had behind her this is pushing 8500-9000 including the trailer pulled it like a champ. This here was before the lift/level and tires though. Here I'm running the stock perellis which was the most nerve wrecking thing about this 200 mile journey to Canadaguia NY and back to Buffalo area.

 

Gotta love pics of trucks being used fer their intended purposes!

Although, I'm not sure yer truck is technically "intended" fer use in pullin' might near 9K lbs. 5.0, right?

Anyway, do try to ease up on the air a bit, and see if it doesn't help all the way around.

 

Yes 5.0 and thanks again and I will indeed try droping to around 45-50 psi and see how that feels

 

I was thinking 45 psi cold. I saw a Chevy 1500 Crew Cab 4x4 yesterday, it had 4 or 5 people inside, pulling a triple axle trailer, loaded with what appeared to be 5 metal pallets and a medium size backhoe. The point is, the rear brakes were smoking as he was driving down the highway at 60 mph, and the rear suspension was bottomed out.

Don't go wild, when it comes to towing with your truck. It may be able to accomplish the task, but the task it's performing may be to great to accomplish safely.

 

You are correct on making sure your safety and others . But also sounds like this was doing something wrong. Knowing how to properly load a trailer and keeping your trailer brakes adjusted properly knowing how to set the gain on your trailer brakes all come into effect when your towing. And the picture I have up there my suspension is not bottomed . Not saying that you were picking on it just stating the fact. And with the properly adjusted brakes and weighted trailer I stopped fine

 

Obviously the Chevy couldn't handle it lol