ConiferEric

So I talked two friends that have the BFG KO AT2 tires. One guys has a f150 with the ranchos and the other drives a tundra with bilstein 6112 shocks. Both said that they noticed very little difference in ride quality from the stock tires and they are keeping pressures between 40-45

DrillRig52

36psi is too low to run on the highway with 10ply tires. I would highly recommend airing them up to 45 minimum. I run mine at 55 and actually enjoy the stiffer ride. A half ton will always ride like a brick with 10ply tires, there's no way around it. I don't think your Ranchos are to blame.

nate438

Thanks Eric for asking your buddies about those tires, really appreciate it! I think when I get some cash together that's the route I'm looking to go.

Drillrig52, thanks for your input also, I will work with the air pressure a bit but agree that once a stiff tire always a stiff tire!

vinnydstx

I have 305/55/20 (33x12.5x20) Nitto Grappler G2 xl's. They are only 4 ply and they ride great. I have had e rated tires before. The number of plies makes a huge difference.

SteveLord

^ Except those also require paying the premium for 20 inch wheels for some of us. Doh. :P

Pauli18c

The Ranchos I don't find stiff at all, I've never run them on the lowest setting.
I had Nitto Trail Grapplers, and then switched to Goodyear Duratracs. The Duratracs ride way smoother than the Trail grapplers

joedotmac

There are multiple aspects of the tire alone that are likely contributing to your issue. Assumption your running the Toyo Open Country MT 33x12.50 18 LT.

The stock tire, depending on wheel diameter, weighs right at 40 lbs. Toyo has the tire listed above at 75lbs. The added unsprung weight makes a huge difference in ride compliance.

The MT blocks aren't near as compliant on pavement compared to a AT or All-Season tire.

The extra plys are there to raise load capacity and improve handling for such loads. The extra plys don't improve ride compliance.

twhall9396

I've got the Ranchos and I went to 315/70/17 falken wild peak on my 09 lariat and I don't get a real rough ride and have them pumped to 50. Only problem I have is I think I have a tire out of round and get a slight vibration at 50mph but when I put rancho on they were a little stiff had to wear in some

nate438

Joe,

You are correct on the tire, thats what I'm running for a tire. I'm also running 18" XD Rockstar wheels so not sure what the weight is compared to a factory wheel but again good point with the weight difference.

Also I changed the setting to middle so 5 or a 6 on the rancho's and the ride actually dampens better so appreciate the advice there, I think my tires are the majority of the issue now.

Based on what you were saying Joe I might "Geek out" and figure up the stock rim and stock tire weight and when I go to replace them see if I need to look at different wheels as well or factory with the new tire combo to get back to as close to that as I can with a larger tire.

nate438

Joe,

You are spot on after digging here is what I found. My current setup is 22 Lbs per wheel heavier than stock! That's a ton of unsprung weight and with a super hard tire no wonder it rides terrible. The suspension can't keep up with that extra weight fast enough and the tires don't soak anything up. I laid out what I'm going to do to get within 8.2 Lb's of the stock setup, that should ride much better!

Stock wheels 42 Lbs
Stock Good year tire 275/65/18 40.5 Lbs
Stock Total 82.5 Lbs

Current setup
XD Wheels 32.5 Lbs
Toyo MT 33x12.50 72 Lbs
Current Total 104.5 Lbs

Future setup
XD Wheels 32.5 Lbs
BFG K02's 275/70/18 58.2 Lbs
Future setup total 90.7 lbs