Tire pressure 2011 F-350 KR - Ford Powerstroke Diesel Forum
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Old 08-06-2011, 05:35 PM
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Tire pressure 2011 F-350 KR

I just picked up my new pickup yesterday from the dealer. It has the 20 " rims on it and when I looked at the tire pressure sticker on the door jam it says to run 80psi rear and 60psi front. I like the truck but it does seem to ride ruff in the rear. I was thinking about airing the rear tires down to 55-60psi when not hauling or towing. What is everyone else running for psi and does it make a big difference on ride?
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Old 08-06-2011, 05:48 PM
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It will make a difference but if you air them down, you TPMS will probably trip the light and you'll get a warning showing on your dash.
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Old 08-06-2011, 08:54 PM
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I'v had them down to 65 psi in the rear but it seems to bounce more,now i'm running 80 psi and switch to Bilsteins shocks.....wayyyyy better
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Old 08-06-2011, 09:02 PM
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Yeh I noticed that with my new tires. Bouncy ride at 70psi actually caused some odd wear at first. Then at 80psi tires rode like butter.
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Old 08-07-2011, 03:59 AM
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I have the same setup up as you, 80 in the rear it rode like a board. I dropped the rear tires down to 50 and it now rides very well for a 1 ton truck. TPMS is now on but to me it's worth the ride dirrerence. I feel Ford should have the sensor set up that if any one of the tires goes below 50psi or so it should then turn on the light. For me and the way I use my truck 60-65 in the front and 50-55psi in the rear works very well and always did in all my super dutys. I would only air up the rear tires if I was going on a long trip and hauling heavy. Hope this helps..
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Old 08-07-2011, 07:56 PM
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Yeah thanks for the replies. Psdcasper I think I will do the same as u and try running my rear tires at 50-50psi. I did this on my last truck an 08 duramax and it seemed to work good and did not affect tire wear. Having the light on the dash is not that big a deal for a better ride my suspension might be a bit stiffer right now to because everything is brand new.
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Old 08-09-2011, 11:47 AM
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80psi is DEFINITELY too much air in the rear tires when unloaded. In the past some dealer's would lower the TPMS values for you but from what I've heard Ford has updated the IDS software to not allow this anymore.

My solution was to re-train the tire locations (page 236 of the owner's manual) and tell the computer that the fronts are in the back and the backs in the front. This way I can run the rear tires as low as 49psi (65 x 75%) and run the fronts as low as 60psi (80 x 75%) and not have the TPMS light come on.
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Old 08-10-2011, 06:57 AM
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Thanks for the heads up. I am going to try it this weekend. I didn't realize that the system was looking for only 75% of recommend air pressure. That should fix me right up.
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Old 08-10-2011, 10:12 AM
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You can also adjust or remove the TPMS light with the H&S tuners.
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Old 08-15-2011, 05:26 PM
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Quote:
Originally Posted by doczenith1 View Post
80psi is DEFINITELY too much air in the rear tires when unloaded. In the past some dealer's would lower the TPMS values for you but from what I've heard Ford has updated the IDS software to not allow this anymore.

My solution was to re-train the tire locations (page 236 of the owner's manual) and tell the computer that the fronts are in the back and the backs in the front. This way I can run the rear tires as low as 49psi (65 x 75%) and run the fronts as low as 60psi (80 x 75%) and not have the TPMS light come on.
Hey just to let you all know it worked for me. I set the Front tires at 68psi and the rear tires at 55psi and trained the tires starting with the left rear and working all the way around to the left front. 200 miles and still no light. Thanks for the info, worked great!
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