Tire question - should I be concerned?

[Dustyhd]

For trailer wheels check the back of the the wheel, most are stamped with load and pressure ratings. For a particular truck check with the manufacturer, many are just rated for load. For a 2015+ f150 the highest rated wheel that Ford lists is 2275lbs per wheel and that’s for HDPP optioned trucks. Why it’s not at least 2400lbs I don’t know.

[goduc]

Originally Posted by tbaker65

I'm not disputing what you say about the rims, but on that note, I'd be circumspect with whatever any "tire rep" or the like tells you... I'd always get a second objective opinion.

Actually the Discount tire store I go to is pretty good. I went in looking for some rims for my Ram 2500. Told him I tow a 5th wheel. Every rim I liked he called the rim MFG rep and checked for towing. Out of the 5 or so rims l liked only a couple were approved for 5th wheel towing. Some of those spindly looking rims aren't all that stout.

I should say I never intended to run 80 psi in my tires on that F150. So maybe to clarify the psi I was referring to was in the 50-65 lb range. I never had more than 4000 lbs on the rear axle. RAWR was 4050 lbs. Discount said all I needed was 45 psi for my weight.

[FrankG]

With a standard rear end more energy is transferred to the right rear wheel than the left. This will account for slightly elevated tire temps in the right rear wheel. (It's doing more work) Tires on the sunny side will also be slightly elevated in pressure and temps.

Hope this helps.

[FarmerJim]

Originally Posted by Ida Ratherbe Camping

I personally would inflate rear tires to the psi stamped on sidewall when towing. Door sticker is for empty weight and comfort of ride. IMO.

If you haven't weighed it and used inflation tables then I would (notice I said "I" ) use the max air pressure on the side of the tires cold as the poster above stated !

[Tireman9]

I thought the question was about RR tire temperature.

IMO as a Tire Engineer, If your temperature is increasing 10F then I would expect your tire pressure to increase 2%

Now if you are running an external TPM sensor screwed onto a metal valve stem then a big driver of the temperature reading is the temperature of the metal wheel rather than the temperature of the air in the tire. If you have a brake or bearing heating up it will heat up the wheel.

Those items would be what I would check before getting all tied up in a knot with tire pressures, assuming you have an accurate digital tire pressure gauge and the TV tires were set the same RR & LR then unless there was some significant change in tire pressure, which you said there was not, I would not worry about inflation till you figure out why the wheel is getting hot.

[eye95]

Swap the two rear sensors. See if the readings swap. If they do, likely you have a bad sensor.

[FarmerJim]

Originally Posted by eye95

Swap the two rear sensors. See if the readings swap. If they do, likely you have a bad sensor.

X2 This is the EASY right answer