Dumb Tire PSI Question
#1
Dumb Tire PSI Question
I actually have never noticed this, which is embarrassing, but should I adjust the tire PSI when the truck is loaded up? My tires are rated at 65psi cold. It was set at that when unloaded. However, with our toy hauler and approx. 1000lb of tongue weight, the PSI jumped to 75. Should I air the tires back down to 65?
#2
#3
Tire pressure does not change when you put a load on it. You likely noticed an increase from being HOT.
Good example...You air your spare tire when it's off the truck and when you put it on the truck, it's pressure remains the same.
Cold PSI is the MAX PSI rating when cold and is the MAX PSI rating for the MAX Load capacity(weight rating of the tire)
So, in other words, in order to haul the most amount of weight the tire can handle, you need to inflate to the MAX PSI.
You can under inflate if the load isn't as much.
I run 35psi empty, loaded and while towing. I never change my tire pressure. My tires are rated at 50PSI Max I believe but since I never run them at or near their max weight rating, it's perfectly safe to keep them at 35psi.
Good example...You air your spare tire when it's off the truck and when you put it on the truck, it's pressure remains the same.
Cold PSI is the MAX PSI rating when cold and is the MAX PSI rating for the MAX Load capacity(weight rating of the tire)
So, in other words, in order to haul the most amount of weight the tire can handle, you need to inflate to the MAX PSI.
You can under inflate if the load isn't as much.
I run 35psi empty, loaded and while towing. I never change my tire pressure. My tires are rated at 50PSI Max I believe but since I never run them at or near their max weight rating, it's perfectly safe to keep them at 35psi.
#4
#5
The tires at their max PSI will be stiffest giving you the roughest ride. I'd suggest airing down some for everyday use. I run 35psi for my 1500 series. I would say dont go below 50psi for a 2500
#6
#7
Thanks for the input. I just needed quick answers as I was getting ready to head out to the desert.
FYI, it was on a F350 super duty. With the nitto terra grapplers. I believe the door sticker PSI exceeds these AT tires and Americas tire goes strictly off of the Factory tire ratings, which is dumb. I believe my Dad recently had them rotate the tires. I just aired them down to 65psi for the trip.
I actually ONLY checked the tire pressure when they were cold, with the trailer hooked up, so I assumed the rear tires were at the same PSI as the fronts. I had 75 rear, 65 front. All in all, I think the pressures were off from the get-go, confusing me.
FYI, it was on a F350 super duty. With the nitto terra grapplers. I believe the door sticker PSI exceeds these AT tires and Americas tire goes strictly off of the Factory tire ratings, which is dumb. I believe my Dad recently had them rotate the tires. I just aired them down to 65psi for the trip.
I actually ONLY checked the tire pressure when they were cold, with the trailer hooked up, so I assumed the rear tires were at the same PSI as the fronts. I had 75 rear, 65 front. All in all, I think the pressures were off from the get-go, confusing me.