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General Forums => The Mess Hall => Topic started by: mrcabinet on December 10, 2009, 02:53:29 PM

Title: Air Pressure for BFG A/T 33X12.50
Post by: mrcabinet on December 10, 2009, 02:53:29 PM

Just curious as to what others are running. I've been experimenting, going from 25 psi to 34 psi. Right now they're at 28 psi, which seems to feel fairly decent.

Title: Re: Air Pressure for BFG A/T 33X12.50
Post by: Jesse-James on December 10, 2009, 02:57:38 PM

I did a chalk test on mine, but when I ran 33's I ran 28.

Title: Re: Air Pressure for BFG A/T 33X12.50
Post by: sharpxmen on December 10, 2009, 03:13:01 PM

Quote from: mrcabinet on December 10, 2009, 02:53:29 PM

Just curious as to what others are running. I've been experimenting, going from 25 psi to 34 psi. Right now they're at 28 psi, which seems to feel fairly decent.

i found that 31 psi works best for me but i have M/Ts so that could be different and i also have 10'' wide rims and the tire sits flat anyway so could be different if the rim is narrower.

Title: Re: Air Pressure for BFG A/T 33X12.50
Post by: jfrabat on December 10, 2009, 03:32:43 PM

Quote from: Jesse-James on December 10, 2009, 02:57:38 PM

I did a chalk test on mine, but when I ran 33's I ran 28.

33X12.5 KM2's MT on 8" wheels; 28 also works for me.

Title: Re: Air Pressure for BFG A/T 33X12.50
Post by: neale_rs on December 10, 2009, 05:27:58 PM

33 X 12.5 15 KMs on 7 inch rims at 25 psi.

Title: Re: Air Pressure for BFG A/T 33X12.50
Post by: mrcabinet on December 11, 2009, 10:29:29 AM

Thanks for you replies!
25 was too soft and 34 was too hard for me. At 28 the front still seems to drag a little bit while turning so, since I have 10" rims I think I'll give 30 or 31 a try.

Title: Re: Air Pressure for BFG A/T 33X12.50
Post by: jfrabat on December 11, 2009, 11:06:45 AM

Quote from: mrcabinet on December 11, 2009, 10:29:29 AM

Thanks for you replies!
25 was too soft and 34 was too hard for me. At 28 the front still seems to drag a little bit while turning so, since I have 10" rims I think I'll give 30 or 31 a try.

At 28, I do feel it takes a fraction of a second for the Jeep to turn when I am driving and suddenly turn the wheel...  But more pressure, and the ride becomes too stiff for my taste

Title: Re: Air Pressure for BFG A/T 33X12.50
Post by: dwtaylorpdx on December 11, 2009, 12:03:17 PM

Remember to set the pressure cold, and occasionally check it hot. I have found some AT tires do heat up a lot, I end up adjusting tire pressure based on weather and driving conditions and mission of the day :) For instance if I'm headed down the freeway and I know its going to be hot, I usually start at my base pressure and bleed a couple pounds off if its going to be a multi day / many hour freeway burn. I try and keep the working pressure under 35 on my Toyo's. Other wise I need new fillings at the end of the day since they are 10Ply load range E  :yikes:


Dave

Title: Re: Air Pressure for BFG A/T 33X12.50
Post by: mrcabinet on December 15, 2009, 08:28:53 AM

Well, it turns out that my old tire pressure gauge was off by about four pounds (low). I found out when I used a friend's fancy schmansy digital gauge. 28 was actually closer to 24 and 34 was more like 30. I took the pressure up to 33 and man, what a difference! The ride is a tad stiff, but driveability on the freeway is 10 times better. No more wallowing around or drag when I turn the wheel!