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Curious to know how the rest of you inflate your tires before a trip. Knowing the max inflation and for every 10° rise or fall in temperature causes the pressure to rise or fall 1psi for our camping season tires (Toyo AT3 80psi max) we usually air them to 75. This keeps us right close to max whether during the travel to our destination. Do most run close to max as recommended or do you create 'wiggle' room?
Run the door sticker pressures if your loaded. It's probably 75-80 PSI in your case
That applies to the stock tires. If you up-size or run something different you have to check the manufacturer recommendation. The Toyo AT-3 in the size we run 295/70/18 happens to be 80psi. My other set of tires Ridge Grapplers max inflation is 65 but since those are for off-roading I run them 45-50.
I inflate them cold first thing in the morning and use TST TPMS sensors
I'm running Continentals MPT 81's on my F450 with EC1200 front 70psi, rear 96psi
I inflate to the door sticker. Tire manufacturers allow for increases in ambient temperature and if you check the pressure to weight tables for your tires I think you will find a huge safety factor already built in unless you are running way over your sticker weights. I know I do.
Curious to know how the rest of you inflate your tires before a trip. Knowing the max inflation and for every 10° rise or fall in temperature causes the pressure to rise or fall 1psi for our camping season tires (Toyo AT3 80psi max) we usually air them to 75. This keeps us right close to max whether during the travel to our destination. Do most run close to max as recommended or do you create 'wiggle' room?
Cheers!
When I'm towing, I run the max PSI according to the door sticker. I run stock size tires. When unloaded, I'll run a lower PSI if I think about it. If I don't remember to lower the PSI, I'm not too concerned about it. My truck doesn't see too many unloaded miles, so short trips that have a slightly rougher ride don't bother me.
Yes, I know how to adjust PSI for weight. I just don't care to and I'm not worried about long term tire wear issues.
If I run 80 psi it give me 7,240 pounds of weight on the tires with a 7,000 pound rear axle. So if I am over my tires, I would surely be over my axle rating.
I inflate to the door sticker. Tire manufacturers allow for increases in ambient temperature and if you check the pressure to weight tables for your tires I think you will find a huge safety factor already built in unless you are running way over your sticker weights. I know I do.
Steve
In my research I found a NTSB article from years back that indicated tire manufacturers max load ratings are actually 10-20% what is stated on the load ratings. I'd have to dig the link up but it's the only thing I can think of that allows some of us to be over max capacity. I use the same method others use and inflate when cold and keep 2-5psi in reserve for heat expansion. Anyone want to truly test inflation and wear should perform a 'Chalk' test on the tires.
The manufacturers used to very openly say at RV conferences that anyone could run 10 psi over max on truck tires without a problem.
Steve
Given what tires do and how they are treated, I think manufacturers build in a whole big margin of fuff factor into their numbers. So 10 psi isn't surprising at all!
Curious to know how the rest of you inflate your tires before a trip. Knowing the max inflation and for every 10° rise or fall in temperature causes the pressure to rise or fall 1psi for our camping season tires (Toyo AT3 80psi max) we usually air them to 75. This keeps us right close to max whether during the travel to our destination. Do most run close to max as recommended or do you create 'wiggle' room?
Cheers!
Tire pressure specs are based on “cold” ambient temperatures. I adjust our truck’s rear tires in the morning shade to 80 psi cold when carrying the camper. The TPMS indicates the operational rear tire pressure increases to ~90 psi.
Tire pressure specs are based on “cold” ambient temperatures. I adjust our truck’s rear tires in the morning shade to 80 psi cold when carrying the camper. The TPMS indicates the operational rear tire pressure increases to ~90 psi.
I check the tire pressure every day that I drive. However, our truck’s TPMS system reports each individual tire’s pressure to the instrument panel and to the FordPass app on my iPhone.
This morning’s FordPass report is attached below (truck is lightly loaded).
I don’t worry about a couple of psi here and there when lightly loaded. However, when carrying the camper, I adjust as necessary (temperature, elevation) on days that we drive.
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