Tire Pressure for Argosy and Tow Vehicle

[DKB_SATX]

Not really. The problem with tire aging is from the physical and chemical properties of rubber, not so much from different qualities of tires. I'm sure that a tire that's better when new is likely to be better at a given age, but it will still have suffered from the effects of time.

[crabbey1]

Thanks for the heads up. After reading bunch of threads on the subject, I think I will stick with the GYMs, simply to save a couple hundred bucks...

[crabbey1]

OK so I pulled the trigger on the GYMs ST 225/75R15 C Rating.

Now I currently have the pressure set at 45 PSI on the trailer (50 psi MAX) and the truck set to 42 psi (44 psi MAX on tire and 35 psi MAX on the door tag).

Should I increase the trailer to 50 psi and decrease the truck to 35 psi?

[DKB_SATX]

It's 35 on the door tag the recommendation, or the max? I'm guessing it's the normal operation recommendation.

Generally I think ST tires are supposed to be run at their side wall max, especially if you're anywhere close to their rated capacity. You have plenty of room with the LRC tires, but I'd run them at 50 if they were on my trailer.

[crabbey1]

Well the door tag is the recommendation for normal driving but nowhere in the manual does it tell me what to do under a towing situation...

[willapus]

Originally Posted by Wazbro

My brother has a set of Kumho tires on his truck that have been good, haven't tried them on a trailer though.

I'm using general tire grabber hts LT 245/75R16 on the sequoia and kumho lt 225/75R16 on the streamline. I love the general tire and the kumho have about 4000 miles on them and seem just fine.

[willapus]

Originally Posted by crabbey1

Well the door tag is the recommendation for normal driving but nowhere in the manual does it tell me what to do under a towing situation...

Most people here seem to tow at max psi on rear tv and tt, in order to minimize sway and heat build up in the tires. The greater psi the less the tires flex, and more the tires flex the hotter they get.

[CapriRacer]

Originally Posted by crabbey1

Well the door tag is the recommendation for normal driving but nowhere in the manual does it tell me what to do under a towing situation...

Ah, but the placard is the worst case - and towing would be covered by that worst case.

The fact that the manual doesn't explicitly delineate towing also tells you that the placard pressure is what they are recommending for ALL cases - including towing..

[crabbey1]

Well I found the Ford Towing Guide online and this is what they have to say about tire pressure:

TIRE PRESSURE
Underinflated tires get hot and may fail,
leading to possible loss of vehicle control.
Overinflated tires may wear unevenly.
Tires should be checked often for
conformance to recommended cold
inflation pressures.

Sounds to me that it is better to error on the high side rather than the low side. Another thing I read in another forum is to follow the door tag if you have the original tires, if not follow side wall. Anyone know what kind of tires came on a Ford F150 5.4L?

[CapriRacer]

Originally Posted by crabbey1

........Sounds to me that it is better to error on the high side rather than the low side......

Yes, that is true.

Originally Posted by crabbey1

........ Another thing I read in another forum is to follow the door tag if you have the original tires, if not follow side wall.....

Unfortunately, that is not true.

If you are using the same size as listed on the vehicle tire placard, then the pressure listed there is as applicable as the original tires.