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Old 08-27-2011, 01:46 PM
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245 75 17 front tire pressure ??

2006 f350 crew cab dually, just had some new tires installed.....

What tire pressure should I run in the front? The sticker inside the driver side door states 75 psi and 60 on the rears.
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Old 08-28-2011, 02:31 PM
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I went ahead and done the chalk line across the tires. I ended up with 68 lbs front and 50 rear. The rear still seems to be just a little over inflated. Still leaves about a 1/2 inch of chalk on both sides of tread on the tires (this is unloaded). Loaded I would go ahead and do 60 in the rear and 75 in the front. These tires are Michelin AT/2.

Last edited by cmssorrell; 08-28-2011 at 02:35 PM.
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Old 08-30-2011, 12:19 PM
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Thanks for the update as I was just reading your first post. I run 80 psi in all 6 of my tires, and didn't even think to do the chalk test.

The chalk test is to go from one side of the tire to the other, roll the truck/tire 360* and see what has wore off correct?.....then adjust pressure accordingly for the line to wear off evenly across?
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Old 08-30-2011, 01:01 PM
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tire pressures

I get a better ride with 5 psi lower front and rear
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Old 08-30-2011, 02:21 PM
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I run 75psi all the way around on my dually, and will drop the rears to 60psi if I tow over 6k. Not too concerned about the tire wear, but I get a marginally better mpg with the higher pressures.
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Old 08-30-2011, 02:40 PM
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Quote:
Originally Posted by Quickerthanu View Post
Thanks for the update as I was just reading your first post. I run 80 psi in all 6 of my tires, and didn't even think to do the chalk test.

The chalk test is to go from one side of the tire to the other, roll the truck/tire 360* and see what has wore off correct?.....then adjust pressure accordingly for the line to wear off evenly across?

Yes, or you can drive for about a block or so and see what's left of the chalk line that was drawn

The pick below - first one is under inflated, middle is over inflated and the last pic is a good one.
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245 75 17 front tire pressure ??-tirepressurecutaway_small.jpg  

Last edited by cmssorrell; 08-30-2011 at 02:44 PM.
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