245 75 17 front tire pressure ?? - Ford Powerstroke Diesel Forum

 
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post #1 of 6 Old 08-27-2011, 01:46 PM Thread Starter
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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.

2008 Ford F350 Lariat DRW

All stock
2012 Keystone Avalanche 330re
2007 Harley Davidson Ultra Classic

cmssorrell@yahoo.com
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post #2 of 6 Old 08-28-2011, 02:31 PM Thread Starter
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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.

2008 Ford F350 Lariat DRW

All stock
2012 Keystone Avalanche 330re
2007 Harley Davidson Ultra Classic

cmssorrell@yahoo.com

Last edited by cmssorrell; 08-28-2011 at 02:35 PM.
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post #3 of 6 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?

SOLD-2006 F-350 CrewCab, short bed dually, 4.10's, FX4/Lariat, PHP tunes & 58v FICM, 5" Diamond Eye exhaust, & much more....
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post #4 of 6 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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post #5 of 6 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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post #6 of 6 Old 08-30-2011, 02:40 PM Thread Starter
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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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2008 Ford F350 Lariat DRW

All stock
2012 Keystone Avalanche 330re
2007 Harley Davidson Ultra Classic

cmssorrell@yahoo.com

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