BFG M/T KM Question on tire pressure. - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 12-07-2009
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BFG M/T KM Question on tire pressure.

I have a 05 supercab 4x4 4.0. I just had the truck fitted with 255 70 R16 Bfg mud terrain km's I was wondering if anyone had a good tire pressure to run in these tires that allow for proper tire wear. They are at 40PSI right now. They ride good, I just don't want to get overinflation wear signs.
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Old 12-07-2009
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they are probably over inflated. just deflate them until you can see that all the tread is on the ground. i have 33x12.5s and the mounting place set them to 42 psi, and i have to run them at 23 psi for the tread to all be touching. im going to say 40 psi is too much.
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Old 12-07-2009
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id say between 30-35 is good. depending on what you carry. If you are going to be towing definitly bump it up to 40-45
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Old 12-07-2009
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^^^ agree i run my 30s at 35-40
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Old 12-07-2009
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Isn't that tire size stock? My sport trac had 255/70R16s stock and I believe the tire pressure on the door jamb was 35 or something. 40psi is over inflated a bit, for sure.
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Old 12-07-2009
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No 245/75/16 is stock... Id say around 30-35 would be good. Thats usually what i run..
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Old 12-07-2009
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What came on the truck was 255/70/R16's I put the size right back on. Instead of the RT/S in a load C? tire... I stepped up to a LT tire in Load D. I am just curious if this makes any differance.
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Old 12-08-2009
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i would run 32-34. ur going to get bad tire wear at 40psi. ur door sticker should say 30psi but with a mud tire ur going to want a little more. the sidewalls are a lot thicker.
i run my 35x12.5's at 32 front 33 rear. even that seem to be a lot sometimes.
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Old 12-11-2009
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I run my front at about 34 to compensate for the engine weight and about 30-32 in back, cuz there is no weight
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Old 12-12-2009
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so we just got a foot and a half of snow today... wow are these tires great :) I'm lovin it.
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Old 12-12-2009
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i run mine at 35 all the time. and when im in the dunes i run em at 10 psi
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Old 12-12-2009
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yup 30-35 is a good guideline.. 40psi is too much..
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