bigsmit

my tires are e rated but they are mud tires and expensive

brulaz

The stock P rated tires that Ford puts on will carry the weight that your truck is rated for. Guaranteed; Ford wouldn't have put them on otherwise.

But P rated tires are designed more for comfort under light loads than handling under high payloads. They have fewer plies and softer side-walls than LT rated tires and are designed for lower air pressures.

So you may notice some squirm or wiggle affecting the truck's handling when carrying heavy loads like your 5th wheel. With the load you're talking about, I'd trade them in for LT tires.

PawPaw

Since you are pulling with a F-150 more weight will be on the rear axle and I would defintely go with an LT tire E or D rated. Also can prevent blowout's or punctures with extra weight then a P rated tire will. Tires can hold from 65-80 psi safely at max load.

dcfluid

Your rims have a load rating on them too. You shouldn't exceed the weights and pressures for the rim. My previous aftermarket rims were stamped on the backside.

luvmyretirement

Thanks everyone. I guess I will have to bite the bullet and put out the money for 20" E rated tires. I thought I might get D rated but there is very little difference in price and unfortunately VERY VERY little selection for 20 inch tires.

volvodoc

Find some take-off 18inchers. Maybe you can trade your 20s for them. this will give you lot more options for tires.