I am trying to figure out the correct tire pressure. We have 1/2 truck with BF Goodrich P275/65R18 tires. The trucks door panel says 30psi Front and 33psi Rear. Max tire pressure on sidewall of tire says 44psi. We are pulling a 19 foot Toy Hauler with a weight distribution hitch. The Toy Hauler tires show max tire pressure of 50psi. What should I run for tire pressure for the truck and Toy Hauler? Thanks
There has been enough discussion on tire pressures to make War and Peace seem like a handbook!
You'll get lots of answers but I would load up all tires to their max cold pressure when towing.
When not towing drop the truck pressure to the door pressures.
Dick_B
2003 SunnyBrook 27FKS
2011 3/4 T Chevrolet Suburban
Equal-i-zer Hitch
One wife, two bikes (both Electric Schwinn's with motor assist)
I'd run max cold tire pressure on the 1/2 Ton truck, and look on the TH sticker for recommended th tire pressure, its probably max tire pressure also.
The truck owners manual will probably have towing tire pressure recommendations also.
You could always weight your rig and compare tire load,axle, max tongue weight capacities, to actual tongue weight, and real gvw. Then adjust air pressure as needed.
To get max tire load capacities, max inflation pressure is needed.
My guess is, with a 1/2 ton truck and a loaded 19' TH, you will be close to max load if not over on all, especially tongue weight once truck is loaded with passengers, fuel,and gear.
This would at least require max tire pressure all around.
Well you are running P rated tires, I would use max tire pressure on sidewall for towing and drop back to door sticker pressures when not towing. The P rated tire is a car tire not a LT which is a truck tire. The sidewall will flex more on a P rated tire than a LT. So that means you want to take out the flex = heat, the stiffer you make the tire the less flex which means cooler running. This good for towing but not driveabilty when not, i.e, rough ride unloaded. If you plan on towing alot I would switch to an LT tire.
River&Sand wrote: Well you are running P rated tires, I would use max tire pressure on sidewall for towing and drop back to door sticker pressures when not towing. The P rated tire is a car tire not a LT which is a truck tire. The sidewall will flex more on a P rated tire than a LT. So that means you want to take out the flex = heat, the stiffer you make the tire the less flex which means cooler running. This good for towing but not driveabilty when not, i.e, rough ride unloaded.
x2
I have since switched to LT tires from my stock P-rated tires, but previously I'd run max (sidewall info) when towing and a little lower when not carrying a load. I still do the same with my LTs. In addtion to ride comfort, when not carrying a load, if you run your tires at max air pressure all the time, you can get uneven tire wear (center will wear faster). Probably not as much an issue with P tires as LT.
If you are towing within the capability of the truck, then the pressures listed on the vehicle tire placard are part of that capability. It would probably be beneficial to add a few more psi - 3 to 5 psi - but adding 50% more should sound wrong - and it is.
If you are towing within the capability of the truck, then the pressures listed on the vehicle tire placard are part of that capability. It would probably be beneficial to add a few more psi - 3 to 5 psi - but adding 50% more should sound wrong - and it is.
Might be true IF the stock tires are still on the truck.
I always go by the tire for tire information.
If there was a sticker on your tires that said use 50w oil would you put that in the engine???
safercar.gov.: Tires/ Proper Inflation wrote: 5)What about the psi number listed on the side of my tires? Should I fill my tires to that pressure?
Tires are manufactured for many different vehicle makes and models of vehicles. And the psi number on the side of a tire only reflects the “maximum permissible” inflation pressure for that tire — not necessarily the correct psi for your vehicle. When filling your tires, always follow your vehicle manufacturer’s psi recommendations. You’ll find this psi number on your vehicle’s tire information label, as well as in your vehicle owner’s manual.
BF Goodrich wrote: Your tires should have the recommended pressure listed by your vehicle's manufacturer. This information can be found in the vehicle owner's manual and often on a placard located in the vehicle's door jamb, inside the fuel hatch, or on the glove compartment door.
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