I bet those tires are load 'C' tires, not the load 'E' tires most people end up getting. The pressure on the 'E' rated tire will be higher then 39 pounds.

 

The 10 ply E rated tires on my F350 can take 80 psi. They are Firestone TransForce AT.

 

I'am running 40 psi in10 ply e rated tire. A lot better ride than 50psi.

 

 

When I called Michelin they said for their Defender LTX Load E tire in my 18" stock size, 55 pounds was required for my axle. I told them my axle was 4000 pounds, not the 3800 it really is.

 

Ive got the LT package as well with the Wrangler tires....
For our weather here....they are barely adequate and will be replaced by next winter.
Tho I do think for a stock tire they are above average.
Probably last forever but that doesn't matter much to me when I'm stuck somewhere.

 

I am also interested in learning about LT tires. I have a 17 Lariet Screw 4X4 and I am pulling a light weight 28' 5er. Last trip out we got some sway that I didnt care for at all. Mainly bow wave upset from a few Prevosts. I now have my suspension taken care of (Super Springs) and also Timbrens. (Long story)

So even though I am close on my weight in a few categories I know I am good. I havent pulled the 5er since but have read how stiffer side wall tires make a difference. I now have the stock Goodyear 275/55R20. Rated at 113T Looks like if I want to stay at that exact size my best option is Nitto Ridge Grapplers rated at 120Q. I do see other bigger/taller options out there on Craigslist. Like 275/60R20 and 275/65R20. Each add about a inch respectively to the total height of the tire. The 275/65R20, some are rated as 126 which is the highest load I can find and a true E rating.

Question is I know as long as I dont change the 275 I can keep my rims and potentially go to a higher profile. 60R/65R. I have the max tow package so I do have some upgrading already built in. I know there will be no height issues in back even with the 65R. Does anyone know whats the biggest height you can run up front without putting blocks in? Not looking for higher or level. Just a planted Tow Vehicle when towing.

TIA, Jim

 

How do you like them? They are the Kevlar ones?

 

They’re great. Yes, they are the ones with Kevlar. I run the year round and this is their second winter. No problems. They’re a tough tire.

 

DEFINITELY WRONG! Every tire manufacturer publishes a "Load Inflation Table" that converts the load carrying capacity of a P-rated tire at placard pressure to a corresponding LT pressure to carry the exact same load at various sizes. Running an LT tire at the door placard pressure for the stock P-rated tire has the potential to cause sidewall failure or bead separation on an LT tire.