whizbang wrote:
Sonofgun your present tires have a load rating of 2601# ON A PASSENGER CAR. On a truck, your tires are downgraded to about 91%, or 2366#.
"E" rated LT tires at 3600# will make your truck drive like a rock. Not good.
A better choice, and what I did with my F-150, is light truck "C" rated tires at 2535# --- better load capacity without sacrificing ride comfort.
Just because they are rated for 80 psi does not mean you have to run them at 80 psi. At the proper pressure for the weight the ride change will be minimal, at most there will be less sidewall squishing giving small bumps a bigger impact but also increasing stability when cornering.
Most complaints about rough tires have the same issue as rough airbags, too much air for the weight which makes the ride horrible.
Just a quick look at Toyo they have a LRC 2535lbs @ 50 psi and a LRE 3415lbs @ 80 psi. If you go to their Load and Inflation Guide (link below) you will see they are both rated to carry 2535lbs @ 50 psi, the LRE can just increase the load from there. If all you need in 2500lbs per tire then the LRC will suffice but is being ran at 98.6% of its rating where the LRE is at 73.2%, so which one do you think will handle it better?
I have been there for the last two years running my tires at 95-100% of load rating on nearly every camping trip. The tires do lose stability and generate a lot of heat when that close to max load. That's why I now run LRG tires at 65-70% of their rating and have a much more stable and comfortable ride while loaded, not to mention a much better safety factor.
http://toyotires.com/tires-101/load-and-inflation-tables