Tire PSI
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Posting Guru
Joined: Nov 2007
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From: Long Island, NY
Tire PSI
What psi should I be at? The sticker on the door of my truck says 65 But the max on the tire says 80. I have 70 in the fronts and they still look low. I have heard a low pressure will give better traction but kill MPG and tire life.
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Joined: Jun 2007
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I run mine at 65. My understanding it that the higher pressure is for full loads and the lower pressure is for daily driving. I think if you are over the minimum PSI noted on the tires you don't have to worry about abnormal wear. Within the proper range, harder is going to be better for mileage and softer will be better for traction, but I was warned against keeping my tires at 80.
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Posting Guru
Joined: Nov 2007
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From: Long Island, NY
65 is fords minimum. The tires only have a max printed on them no minimum. Anybody know how to get to the stems on the rear? I realy dont want to have to take the tires off just to get the caps off the inside wheels?
Post Fiend
Joined: Apr 2004
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From: Silver Lake Dunes, MI
If the duals weren't clocked right with each other you have no chance of getting to the insides without removing the wheel. If they are clocked right but you have aluminum wheels with the smaller round holes you best option is to use needle nose to get the dust cap off. then use a straight air chuck to get on the stem then don't put the cap back on.
Post Fiend
Joined: Apr 2004
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From: Silver Lake Dunes, MI
Tire pressure is a funny thing, especially on trucks. For me its based more on weight of the truck, loads it carries, and the tires it uses (also how the tires are wearing) different tires wear differently, loads and wieght make a huge difference. There is no right answer to tire pressures. I recommend running as close to the tires max without wearing out the center tread (tire bulging). Ride quality may suffer though.
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Posting Guru
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From: Long Island, NY
Yea I hear you about ride quilty I have the max on the back tires an If I run over a cigarett butt it feels like I hit a speed bump. I think you stand a better chance of damaging the tire if you hit something hard like a pot hole at max psi. O well I guess its a trade off thing thanks for the help.
PS. FYI. The stock rims have a pin and a hole 180* apart on them so when you use them on the rear they are clocked with the stems at 180*.
PS. FYI. The stock rims have a pin and a hole 180* apart on them so when you use them on the rear they are clocked with the stems at 180*.
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Postmaster
Joined: Jun 2007
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From: Rogue River, OR
The old rule of thumb is if the tire is wearing in the center that indicates too much pressure. (center is creating a minimal footprint)
If the tire is wearing on the outside edges it indicates that the tire is too soft. (The tire is actually sucking up in the center)
Wether this will apply to the OBS....try it an see.
Rog
If the tire is wearing on the outside edges it indicates that the tire is too soft. (The tire is actually sucking up in the center)
Wether this will apply to the OBS....try it an see.
Rog
Lead Driver
Joined: May 2000
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From: Senoia, GA
the answer to this question is as different as every person who reads this. Heres a couple of ways to help determine proper pressures. The easiest is to try to slide a thin card under the edge of the tread. Inflate the tire until you can just get the card under the edge a little bit. A more involved check is to place a chalk line across the tread face, drive a short distance straight ahead on a smooth surface and then observe the chalk line. You are looking for it to be evenly worn off the tread. Another variation is to measure the length of the contact patch and make it even front and rear. This works well on vehicle where the rear load can vary, such as a pickup and especially if a recommended pressure is known for the front end. Slip a paper sheet under the tire to stop at the leading and trailing edge of the contact patch, measuse the separation of the two sheets (making sure they are parallel). Then set the rear pressure such that the length of its contact patch is the same as the front.
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