New to towing-tire psi question (and more)

[FreedomTracker]

That 2nd tire dealer that I spoke with explained:

- 35 psi was normal without load
- 44 psi was max without load
- 50 psi suggested max psi WITH load

IMHO I'm now thinking maybe 50 psi after driving the 2 miles to nearest Flying J (somewhat warm) should do it... This should put psi about 1/2 way b/t max on tire & max on load chart when cold.

What do ya think?


P.S. Will happily upgrade on next set of tires... Since I only have 2500 miles on these, can't justify spending $800 to replace almost new tires.

[Glenn5995]

Originally Posted by herk7769

Again it is for optimum ride and handling; not maximum load bearing.

Tire Pressure Checker: Righting the Pressure in Your New Tires

I agree that 35 PSI should not be used for towing. That is why I asked the weight the door sticker has for 35 PSI. I am pretty sure it is not for the GVWR of the F-150. The door sticker will have a recommended tire pressure, but it may not be for maximum cargo carrying. Some vehicles will have several suggestions. The door sticker on my Power Wagon has recommended tire pressures for light loads and maximum loads. The maximum load is the pressure when the vehicle is at its GVWR.

Originally Posted by FreedomTracker

That 2nd tire dealer that I spoke with explained:

- 35 psi was normal without load
- 44 psi was max without load
- 50 psi suggested max psi WITH load

IMHO I'm now thinking maybe 50 psi after driving the 2 miles to nearest Flying J (somewhat warm) should do it... This should put psi about 1/2 way b/t max on tire & max on load chart when cold.

What do ya think?


P.S. Will happily upgrade on next set of tires... Since I only have 2500 miles on these, can't justify spending $800 to replace almost new tires.

Well Ford has a problem (more likely the person that you talked to) if they are saying it takes the max PSI from the tires they are using to drive around empty and they need to be inflated above the tire manufacturer's max PSI to carry a load.

I wouldn't inflate them over 44 PSI cold if that is the maximum pressure stamped on the sidewall of the tire.

[Herk7769]

Originally Posted by Glenn5995

I wouldn't inflate them over 44 PSI cold if that is the maximum pressure stamped on the sidewall of the tire.

Ditto

[FreedomTracker]

The Goodyear load chart (website) shows the max load rating is 51 psi at 2601 lbs load per wheel. However, the numbers on the actual tire say 44 psi max.

I'm just trying to understand and hopefully do the right thing...

[Herk7769]

Originally Posted by FreedomTracker

The Goodyear load chart (website) shows the max load rating is 51 psi at 2601 lbs load per wheel. However, the numbers on the actual tire say 44 psi max.

I'm just trying to understand and hopefully do the right thing...

I have seen this discrepancy before on here. I will look around in the archives and see what I can find.

http://www.forestriverforums.com/for...ces-13629.html

http://www.forestriverforums.com/for...ing-18521.html

[Herk7769]

I think I found what I was looking for. It was in the "herkbrary" already, but I found my original reference and linked to it.

http://www.cjtire.com/pdf/Replacement%20Tires.pdf

[Glenn5995]

Originally Posted by FreedomTracker

The Goodyear load chart (website) shows the max load rating is 51 psi at 2601 lbs load per wheel. However, the numbers on the actual tire say 44 psi max.

I'm just trying to understand and hopefully do the right thing...

I see what you mean. The Goodyear's website does say 2601 @ 51 PSI.

Wrangler SR-A Tires | Goodyear Tires

I would go with what is stamped on the tires. Those have to comply with DOT regs. Websites and brochures constantly have mis-information. Somewhere it probably has a disclaimer about accurate at time of printing or not responsible for errors.

[FreedomTracker]

Herk,
Good info on load capacity... I'm OK on load, i was just trying to get towing psi correct (44 or 51 psi).

Since I'm reading your attachment on my small smartphone screen, hopefully I did not miss anything... Ha :-)

Thx!