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tire pressure?

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Old Feb 24, 2005 | 12:13 PM
  #1  
captain p4's Avatar
captain p4
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From: Joppa, Maryland
tire pressure?

99 ranger 4x4 3.0l ext. cab
what tire pressure should i be running with 245/75/16 cooper discover a/t's?


thanks,
paul
 
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Old Feb 24, 2005 | 12:54 PM
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G2IC_Wraith
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From: Virginia
Look right inside you driver's side door. There should be a sticker there that will tell you what the recommended pressure is to run.
 
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Old Feb 24, 2005 | 01:34 PM
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Waves
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Look at what the tire specs say as well. Then try adjusting pressures within a pound or two and see what you like best.
 
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Old Feb 24, 2005 | 01:45 PM
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G2IC_Wraith
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From: Virginia
Originally Posted by Waves
Look at what the tire specs say as well. Then try adjusting pressures within a pound or two and see what you like best.
The markings on the side wall of your tires are for "MAX" capacity. IE - an OE tire may say on the sidewall that it has a MAX PSI of 44, at a MAX load of 1250 lbs. While the mfgr of the car will have a sticker that says 32 PSI. This is mainly based on the fact that the weight of the vehicle is generally only going to account for ~60-70% of the MAX tireload. Which also means that the PSI should not be set anywhere near the MAX. You use the door sticker and/or the owner's manual.
 
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Old Feb 24, 2005 | 01:49 PM
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I've run mine as low as 28psi as high as 35psi, I generaly run 28psi in the rears and 30 psi in the front. Thats the ride I prefer, although my tires max out at 50psi, it makes my truck ride hard as a rock and the tires wear only on the centers when you run higher pressures in them on trucks as light as rangers. When I tried running as lower than 28psi, I went as low as 26psi, I didn't like the way my truck handled either. Just my 2 cents worth -
 
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Old Feb 24, 2005 | 02:41 PM
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I switched from 225/70/14s to 235/75/15s Blizzaks for winter.

The sticker on my drivers door recommends 35 p.s.i. So when I put on the larger tires i kept the pressure at the same. It didn't take very long for the tires to wear in the centre. Over time I reduced the tire pressure to ~28 P.S.I. and the tire still wore unevently (with the centre wearing the fastest). I then found out that the wider tire you use, the less pressure you require. This is because the trucks weight will be distributed over a larger surface area meanind the pressure at any one point of the tire contacting the ground will be less.

As for a tire pressure recommendation... I got nuttin'. But if it were me, I would see how it handles at ~28 p.s.i. and go from there.
 
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Old Feb 24, 2005 | 06:15 PM
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captain p4
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cool. thanks for the info guys, i'll try it out once the weather clears up some. SNOW WHEELING RIGHT NOW WOO!! lol.


peace,
paul
 
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