Tire pressures

laknox wrote:

prstlk wrote:
This has probably been asked before but because we are leaving in the AM for the summer I need quick advise from the folks on here.

We have a 2013 Ford F350 SRW 6.7L Diesel and a new to us 2016 Keystone Cougar 30' fifth wheel.

We just put on 4 new Goodyear Endurance tires on the 5th wheel. The tire says to run at 80psi and that is what the tire company put in them.

The label on the 5th wheel says to run 65psi in the tires.

Which should we follow? One of us says the label recommendation and the other says the tire recommendation.

What say you? Please advise!

Your rig is almost certainly placarded for D-range tires, which are 65 psi. Your new GYs are E-rated, which is why the sidewalls say 80 psi. Personally, I'd run the GYs at 70, since you're "over-tired" for the weight of your FW. Will ride a bit better and you'll have a bit more "footprint" on the road. Even then, if you check a load chart, you'll have more tire capacity than the D's at 65 psi.

Lyle

The "E" at 65 is the same as the "D" at 65. BUT with a more solid tire. My boat trailer came with 50psi "C" tires and I run my ENDURANCE tires at 50psi. G

Good thing I did have the extra capacity as I had a total bearing failure and removed the bad tire/wheel and aired the other tire to 70psi. Drove 50 miles at 50 mph or less stopping twice to check tire temp and it did not exceed 117 on a 70 degree day.