2013 Laramie with P27560R20s

I have noticed that my tires are squishy while towing an 8000# 35 foot travel trailer. I have the P27560R20 tires. I am thinking that I am getting close to the towing limit on the tires? Why does Dodge put passenger tires vs the LT tires on the RAM? What should I get in LT27560R20? Will the BFG T/A KO2 tires work well for towing?

I have also noticed that the tow capacity/payload in the user's manual is larger than the sticker on the door. Is this due to the passenger tires?

Will going to the LT tires bring my towing capacity up? Will the 20" chrome rims handle the higher PSI of the LT tires?

Any help would be appreciated as I have a 2K mile tow trip coming up.

 

The biggest reason for P tires on half tons is because the average half ton today sees pizza as its heaviest load.

The book shows a higher capacity because it's using the best possible equipment. For example, 3.92 gears will give you a higher capacity than 3.55 gears, 17" wheels/tires will have a higher capacity than 20s, and obviously LT tires will increase towing/hauling over P tires.

Personally, I prefer the comfort while towing the flex of a 17" tire gives over a 20", but 20s can handle your 8000# load. Even though it's within the capabilities, 8000 lbs is a considerable load to pull long distances with a 1500 and I'd get a minimum LT tire with a D Load Range. A D range LT will generally hold 50-65 max cold PSI. E range would hold up even better with 80 PSI, but would be a little harsh when not towing or hauling...

 

I don't know much about towing, but if you look up the rating for the tires that come on these trucks, they are some of the lowest rated tires out there. That's if you have the Wrangler SR-A's. Just cheap tires is likely the problem, although 4 tons is getting close to the towing capacity. What's your tongue weight? That's where your squishy is coming from.

 

Tongue weight is 780. It will be 800# with some groceries.

 

And add in a couple of passengers. I replaced my SR-As with Michelin LTX MS2s.

 

It's not so much that they are cheaper, it's more because everything today is emissions and MPGs to make the government happy. P tires will give better fuel economy not to mention feel more car like on the test drive which is what 80% of half ton truck buyers want...

 

Do you know if the rims will handle the extra PSI?

 

I don't see why not, I had D tires on my old '04 Ram with stock 17s for a while and never had a problem. Check with a Ram dealer for specs on your stock wheels if you are worried about it...

 

Did you run them at 65 PSI? I think that should be OK. I am guessing that the Load Range Es may not be though. I will call the dealer in the AM.

 

I plan on getting new tires in Dec. I'm looking at toyo at II lt275-65-20. They are load range e and rated at 50k miles. There are way more options for tires in that size. You can get a/t or m/t tires.