Tire pressures
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 Key...
Forum Discussion
The OP has not returned, probably due to his leaving to travel? It may also be due to so many opinions, that every tire thread encounters.
Since Jim mentioned Tireman 9, who is a well known TE, and an actual owner of many types of RVs and trailers, I'll mention a few things I learned.
First thing...comparing your truck tire inflation, to multi- axle trailer tire inflation is apples/oranges.
Trailer tire charts have a purpose, and give the absolute minimum pressure required to support the weight you have on them. This, the reason to add a bit of pressure to number given on the chart. How much? Some say 5 psi, which can be right for the tire application they have.
However, a better choice, if using charts for ST tires, is to add 10% to the chart minimum pressure as a true minimum, and 20% better yet, if not over the sidewall indicated max. So on a smaller ST tire, the chart shows 50 psi for your exact weight given, you would add 5 psi minimum, (10%), keeping in mind, this is a minimum. Using percent, rather than an exact psi of say 5, will fit many size tires.
In most cases, using the proper ST tire, shown on the placard of your trailer, the best choice is max tire pressure shown, on that tire. In some cases, that may be just barely adequate, and going up one load range, may be better. If so, most times, using that ST tire at max sidewall pressure, will allow coolest running, best handling.
Truck tires...I'll just say that I run my fronts according to door sticker, all the time. My door sticker shows 80 psi in rear, which I use under heavy load, and lower to 65-70 in rear with light load.
Jerry
Since Jim mentioned Tireman 9, who is a well known TE, and an actual owner of many types of RVs and trailers, I'll mention a few things I learned.
First thing...comparing your truck tire inflation, to multi- axle trailer tire inflation is apples/oranges.
Trailer tire charts have a purpose, and give the absolute minimum pressure required to support the weight you have on them. This, the reason to add a bit of pressure to number given on the chart. How much? Some say 5 psi, which can be right for the tire application they have.
However, a better choice, if using charts for ST tires, is to add 10% to the chart minimum pressure as a true minimum, and 20% better yet, if not over the sidewall indicated max. So on a smaller ST tire, the chart shows 50 psi for your exact weight given, you would add 5 psi minimum, (10%), keeping in mind, this is a minimum. Using percent, rather than an exact psi of say 5, will fit many size tires.
In most cases, using the proper ST tire, shown on the placard of your trailer, the best choice is max tire pressure shown, on that tire. In some cases, that may be just barely adequate, and going up one load range, may be better. If so, most times, using that ST tire at max sidewall pressure, will allow coolest running, best handling.
Truck tires...I'll just say that I run my fronts according to door sticker, all the time. My door sticker shows 80 psi in rear, which I use under heavy load, and lower to 65-70 in rear with light load.
Jerry
