Tire pressure
Junior User
Joined: Jul 2007
Posts: 95
Likes: 0
Ford calls for 60 psi that's to make the truck ride softer
the tires say 80 psi, that's the max for towing an m/t truck would ride very hard at this pressure.
I settled on 70 psi, it's a good comprimise for me
also the higher the psi, the better mileage, BUT, the tires would wear unevenly due to over inflation. too low on the psi does the same.
so 70 psi is good. that's cold psi when hot they will be 2-3 psi higher
the tires say 80 psi, that's the max for towing an m/t truck would ride very hard at this pressure.
I settled on 70 psi, it's a good comprimise for me
also the higher the psi, the better mileage, BUT, the tires would wear unevenly due to over inflation. too low on the psi does the same.
so 70 psi is good. that's cold psi when hot they will be 2-3 psi higher
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
Likes: 1,678
From: Stephensville WI
Be careful about taking recommendations from other owners, every truck is different. You need to experiment to find your sweet spot.
For instance, I am still running the stock 265/70-17 BFGs on my truck, 75 PSI recommended all around. If I lower the pressure to 65 PSI I start to see steering wheel oscillation/wobble after hitting a bump. Lowering the pressure to 60 PSI makes the wobble worse. 70 PSI gives me a decent ride.
Ford does not recommend running anything other than what the door sticker recommends, depsite what others might tell you. In fact, if you take the truck into a Ford dealer to have the "death wobble" problem fixed, the first thing the technician will do is check your tire pressure and inflate to door sticker pressure, per the Ford TSB.
For instance, I am still running the stock 265/70-17 BFGs on my truck, 75 PSI recommended all around. If I lower the pressure to 65 PSI I start to see steering wheel oscillation/wobble after hitting a bump. Lowering the pressure to 60 PSI makes the wobble worse. 70 PSI gives me a decent ride.
Ford does not recommend running anything other than what the door sticker recommends, depsite what others might tell you. In fact, if you take the truck into a Ford dealer to have the "death wobble" problem fixed, the first thing the technician will do is check your tire pressure and inflate to door sticker pressure, per the Ford TSB.
Elder User
Joined: Mar 2005
Posts: 941
Likes: 2
-------if yer tires have a MAX rating of 80--and you run 80, you are NOT running overinflated!!
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
Likes: 1,678
From: Stephensville WI
It all depends on how much weight the tire is supporting. If you run the tire overinflated, the center will have contact with the asphalt, the sides will not. If underinflated, the sides will contact the asphalt, the center will not. If inflation is correct you get the maximum contact patch.
One thing to keep in mind, the pressure for a correct contact patch is a range, not a specific number.
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Brakes, Steering, Suspension, Tires, & Wheels
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Jan 15, 2008 03:24 PM
