Truck tires
I've had very bad luck with tires on my dually due to separation issues. I'm only getting 15k to 20k before this happens and 3.5 to 4 years. I only have the camper on the truck about 3500 miles a year...
Forum Discussion
^Respectfully, 4 psi cold didn’t make any discernible difference in tire capacity, causing tread separation.
Any of those hot Cali afternoons you reference, rolling down the highway, your 76psi cold (thought to be 80) tires were well over 80psi at that time n place.
Pressure varies approx 1 psi for every 10degF and at least 1/2psi per 1000’ elevation change.
And the tires’ max rated capacities are generally (always) reached at max rated pressure.
Although to your point, since heat raises pressure, and less pressure = more heat, if you were having heat issues causing the separation being overinflated may have helped. But we’re splitting hairs now.
Objectively though, I have spent a lot of miles in company provided half ton trucks doing things that should be done by 3/4 ton trucks. And most new pickups especially the fleet specials come with the cheapest tires possible, off the assembly line.
When I’m on the OE set of tires on a newer half ton, and saddle it with a load that is over the rated tire limits, tire squishes and gets quite warm/hot after being in use at highway speeds.
Same tire, typically a 45-50psi rated tire, if aired up to a pressure that takes the static deflection out of it, runs notably cooler.
Have put on a fair amount of heavy load miles with 1/2 ton truck rear tires aired up 10-20 psi over max pressure rating, running cool without issue.
Not recommending it per se or at all, to others, but it’s evidence that more pressure reduces heat.
A little beyond the original discussion I know, but good info imo for those who may not realize it.
Any of those hot Cali afternoons you reference, rolling down the highway, your 76psi cold (thought to be 80) tires were well over 80psi at that time n place.
Pressure varies approx 1 psi for every 10degF and at least 1/2psi per 1000’ elevation change.
And the tires’ max rated capacities are generally (always) reached at max rated pressure.
Although to your point, since heat raises pressure, and less pressure = more heat, if you were having heat issues causing the separation being overinflated may have helped. But we’re splitting hairs now.
Objectively though, I have spent a lot of miles in company provided half ton trucks doing things that should be done by 3/4 ton trucks. And most new pickups especially the fleet specials come with the cheapest tires possible, off the assembly line.
When I’m on the OE set of tires on a newer half ton, and saddle it with a load that is over the rated tire limits, tire squishes and gets quite warm/hot after being in use at highway speeds.
Same tire, typically a 45-50psi rated tire, if aired up to a pressure that takes the static deflection out of it, runs notably cooler.
Have put on a fair amount of heavy load miles with 1/2 ton truck rear tires aired up 10-20 psi over max pressure rating, running cool without issue.
Not recommending it per se or at all, to others, but it’s evidence that more pressure reduces heat.
A little beyond the original discussion I know, but good info imo for those who may not realize it.
