Does anybody know what the max pressure rating is on our stock 18" lariat factory wheels? I know tires have a max pressure rating, but wheels? I have replaced my 'P' rated tires with some 'LT' load range E tires that can hold up to 80 lbs. I don't plan on running them this high for day to day, but when I'm towing I might depending on the load.
Thanks!

 

I believe the wheels are rated to 50lbs. That is high enogh with those LR E tire for anything you want to do.

 

Does anybody know what would happen if let's say I ran 60 or even 70 psi in these tires (max tire pressure 80)? Would it damage the actual wheel?

 

Don't know if it would damage the wheels, but it would certainly wear out your tires early. On an F150, the axle is rated at about a max of 4,000lbs. Most load range E tires are rated at 3300-3400lbs per tire at 80 psi. 50 psi will give you at least 2000-2200lbs per tire. A rating which is equal to or over what your axle is rated at.

 

Okay, it would probably give me a little better ride as well. I just purchased a travel trailer and that's why I put the better tires on there. I wany to make sure I cover all my bases before I go pick it up. Thanks for all your help!

 

You really did not have to go with a LR E. It doesn't hurt, but a LR C will max out at about 2400lbs per tire at 50 psi. Again, well above axle rating. I will not put P series on my vehicles, but a LR C or D is not a problem with anything the F150 is rated to carry.
LR E will give you a little less sidewall flex, but you do pay for that a bit with a rougher ride.