Tire pressure

[sawtooth4x4]

I have an 06' F350 super crew long bed, 4x4 diesel. I had 285/65/18 Nitro
trail grapplers.

What's a good tire pressure to use when I'm not hauling or towing?

When I had the tires installed on Monday the tire shop had the psi set to 80 all around. It was horrible. Pretty unstable. Really bad handling.

I Lowered the psi to 65 in the front and 60 in the back and it feels much better.

Is this to low?

 

[jmaxj]

That's where I run mine at when empty cruising around. Then I air them up before any heavy towing, rides and handles so much better.

Oh and it's the same truck except 265/75/16's

 

[jackjoh]

I use 50 front 40 rear on my Ram in the city and 60/70 towing.

 

[Unimog]

Commercial truck tires sites will have inflation tables that may help: http://www.michelintruck.com/michelintruck/tires-retreads/load-inflation-tables.jsp

 

[LT.]

Check the inside of the door jam for the factory settings. From there, figure out how much more volume of tire you have as a percentage and lower accordingly. There was an old school trick of using chalk. Draw a line across the tread face and drive the truck forward a few revolutions. Check tosee where the chalk was worn the most and inflate or deflate accordingly.

LT.

 

[Bobzilla]

I have the same tires load range E, on a 2001 F-250 Superduty diesel crew cab 4x4 with a 4" lift and I currently run all 4 tires at 45 lbs, had them up around 65 lbs and they were to hard, I also removed the front & rear sway bars and the truck rides much better, it rode like shit at the higher tire pressures?

 

[mbryson]

Check the inside of the door jam for the factory settings. From there, figure out how much more volume of tire you have as a percentage and lower accordingly. There was an old school trick of using chalk. Draw a line across the tread face and drive the truck forward a few revolutions. Check tosee where the chalk was worn the most and inflate or deflate accordingly.

LT.

This