Tire pressure

[charro]

Just wanted to see if everybody is using 65 psi front and 50 psi rear when empty on a 2000 dually. What is the recommended tire pressure when hauling 15k lbs?

[Mopar1973Man]

I'm running 60 PSI front and 40 PSI rear... You might try this idea... http://forum.mopar1973man.com/threads/3949-Tire-Pressure-Calculator

[mr.mindless]

95 all the way around for me

[Mopar1973Man]

95 all the way around for me

That the difference some people haul trailers daily and some remain empty most times. So tire pressure should be adjusted for weight difference or the heaviest load expected.

[dorkweed]

70psi in all 4 tires on my 3/4 ton 2500.

[mr.mindless]

D and E rated tires versus my Fs as well. Steel sidewalls can't run low pressures.The chalk test is really the right way to figure your correct tire pressures at less than full load...And of course if you're up near tire capacity, you should be running full sidewall pressure.

[volkswagon]

The chalk test is really the right way to figure your correct tire pressures at less than full load...

What kind of test is that?

[JOHNFAK]

70psi in all 4 tires on my 3/4 ton 2500.

About the same for me ...... Why only 40 in back mike - as its unloaded an light ?

[dorkweed]

What kind of test is that?

You take some chalk and scratch a wide line in front or behind your tires.....it doesn't matter which direction you go.........and see how the chalk from the ground transfers to your tires. Ideally, you want the chalk to be picked up evenly on the entire width of the tread. If it doesn't pick up evenly, you either air up your tires, or you air down your tires accordingly. I tow a trailer most everyday, therefore I keep my rears inflated to a higher pressure than guys do that don't tow regularly. I'm too lazy to air up and down. My tires aren't worse for it either. Almost 62,000 on the Cooper Discoverer ATR's now!!! I rotate them about every 10,000 miles.

[Mopar1973Man]

Since my towing is seasonal during the winter months I drop the pressures down because a softer tire has better traction on ice and snow. But come summer time and it wood hauling season and camping I'll be dragging a trailer around most of the time so I air the up and leave them.

[mr.mindless]

You take some chalk.....

Thanks dorkweed. I swear I'd posted that already but I failed or it was another thread You can also use chalk or paint on the tire. Start at max sidewall pressure and drop in small increments until the shoulders make good contact, then drop 2-3 more psi for even wear. If your rim width is very narrow you'll end up with low pressure from this method. Be aware of that if you're running wide tires on skinny wheels. Always be sure you're running adequate pressure for your carried weight.