What PSI Do You Use For Highway With BFG KM2s? - JeepForum.com
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post #1 of 16 Old 06-19-2009, 10:41 AM Thread Starter
ElPaso2007
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What PSI Do You Use For Highway With BFG KM2s?

So many have the KM2's I'm sure some of your have experimented with tire pressure for freeway and street use. I've been keeping mine at 32 psi for normal use and airing down to 15 psi for the trail. Mine are 285/70/R17s on Eagle alloy wheels.

Does anyone use a lower pressure for normal use?

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post #2 of 16 Old 06-19-2009, 10:44 AM
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I'm also using 32psi. When they were first installed they were set at 40 but that was far too hard. I plan on remaining at 32. Mine are stock 255/75/17.

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post #3 of 16 Old 06-19-2009, 10:44 AM
N2rock
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trail- 10-15psi (depending on the type of wheeling I'll be doing)
around town: 29psi (allows the tires to absorb most of the bumps in the road)
Highway (if I'm traveling): 35psi

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post #4 of 16 Old 06-19-2009, 11:30 AM
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i was running my 35s at 40psi on the highway, but have since gone to 35 and noticed a better ride for sure. i see some running at 29 and might try it. 325/65/18

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post #5 of 16 Old 06-19-2009, 11:36 AM
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I typically kept my BFG MTs around 30 psi. Ride was good and tread wear was even.
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post #6 of 16 Old 06-19-2009, 11:45 AM
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about 30 psi for me

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post #7 of 16 Old 06-19-2009, 12:55 PM Thread Starter
ElPaso2007
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Thanks, guys. I think I'll try 30 for running around and go back to 32 for highway trips. I was pretty sure I could go a little lower, and I'm sure it will help absorb the bumps a little.
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post #8 of 16 Old 06-19-2009, 12:57 PM Thread Starter
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Quote:
Originally Posted by N2rock View Post
trail- 10-15psi (depending on the type of wheeling I'll be doing)
around town: 29psi (allows the tires to absorb most of the bumps in the road)
Highway (if I'm traveling): 35psi
Profile says you are running 35" tires, though. I don't think I could take the 33 inch tires down to 10 psi for the trail, do you? 15 seems to be good. Much as I would love to go down to 10, I'm afraid I would blow a bead.
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post #9 of 16 Old 06-19-2009, 01:02 PM
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Quote:
Originally Posted by ElPaso2007 View Post
Profile says you are running 35" tires, though. I don't think I could take the 33 inch tires down to 10 psi for the trail, do you? 15 seems to be good. Much as I would love to go down to 10, I'm afraid I would blow a bead.
I don't know. I would think that you could. Hell I was nervous going below 15psi. But finally went for it when we went to K-rocks, and discovered that it held fine, and was incredible on the rocks.

for details and info on our JK's, check out http://n2rock.com

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If you made a snuggy out of a Shamwow, ....would you have to get up off the couch to pee?
Quote:
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At this point if Obama tried to move a little to the right, he would trip over Stalin's corpse.
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post #10 of 16 Old 06-19-2009, 04:06 PM Thread Starter
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I'm sure it was. I did have them down to 12 psi once by accident and that was a smooth ride.
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post #11 of 16 Old 06-19-2009, 11:52 PM
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I run mine at 38 psi cold. The fuel economy is much better (+2-3 mpg on the highway) compared to when I ran them at 34. On the trail I do them at 18psi. I don't want to loose the bead by running them lower.
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post #12 of 16 Old 06-20-2009, 12:23 AM
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I don't want to start a new thread for my own tire pressure question...how about 15 psi for trail use for some 33x12.5x15s...I don't want to lose a tire because i pop a bead out there?

I run 32 psi for normal use...

oh yeah, mine are ATs, not MTs...

2007 White Jeep Wrangler X-auto, black freedom top, 15x8 Pro Comp Rock Crawlers, 33x12.5x15 BFG KM2s, Superchips Flashpaq, 2" OME Spring Lift, Bilsteins, Rusty's Adjustable front and rear trac-bar, JKS Quicker Disconnects, Rusty's adjustable lower control arms (front and rear), PolyPerformance adjustable upper control arms (front and rear), OEM Rubicon Rock Rails, Finishlinewest Stonehenge Series rear bumper, Smittybuilt winch, Body Armor Front High Clearance Bumper w/ KC Highlights mounted, Roadmaster towbar, Valley 2" receiver hitch, Skid Row Engine Transmission skid, sPod switching system, KC Highlights windshield mounted lights, Delta replacement non-quadbar xenon headlamps, and Bestop saddlebags-Member of the United Four Wheel Drive Association and Blue Ribbon Coalition, †John 3:16†

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post #13 of 16 Old 06-20-2009, 12:27 AM
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^^also depends on the wheels you're running

In your case with 8 inch wide wheels that should be fine. The narrower wheels hold the bead better. I have 15x 10's and I choose not to go down quite as far, although I've accidentally wheeled at 15 and didnt have any problems.

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post #14 of 16 Old 06-20-2009, 06:17 AM
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Quote:
Originally Posted by yoda13 View Post
I don't want to start a new thread for my own tire pressure question...how about 15 psi for trail use for some 33x12.5x15s...I don't want to lose a tire because i pop a bead out there?

I run 32 psi for normal use...

oh yeah, mine are ATs, not MTs...
I was running 15psi with the original 32" Wrangler AT's. So you should be fine. 15psi is not all that low.

for details and info on our JK's, check out http://n2rock.com

His: '07 Unlimited X, Jeep Green, Hardtop, auto, 5.13, 2.5" RC lift and too many mods to list

Hers: '08 X Red Rock, soft top, auto. Bunch of mods

Quote:
Originally Posted by tlgraham View Post
If you made a snuggy out of a Shamwow, ....would you have to get up off the couch to pee?
Quote:
Originally Posted by Deepskyy View Post
At this point if Obama tried to move a little to the right, he would trip over Stalin's corpse.
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post #15 of 16 Old 06-20-2009, 10:32 AM
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OK, good....I will take it down to 20 or so, and if that is not enough, then I will go to 15...I didn't air down when I went to superlift...and I am pretty sure it caused me some traction issues...

2007 White Jeep Wrangler X-auto, black freedom top, 15x8 Pro Comp Rock Crawlers, 33x12.5x15 BFG KM2s, Superchips Flashpaq, 2" OME Spring Lift, Bilsteins, Rusty's Adjustable front and rear trac-bar, JKS Quicker Disconnects, Rusty's adjustable lower control arms (front and rear), PolyPerformance adjustable upper control arms (front and rear), OEM Rubicon Rock Rails, Finishlinewest Stonehenge Series rear bumper, Smittybuilt winch, Body Armor Front High Clearance Bumper w/ KC Highlights mounted, Roadmaster towbar, Valley 2" receiver hitch, Skid Row Engine Transmission skid, sPod switching system, KC Highlights windshield mounted lights, Delta replacement non-quadbar xenon headlamps, and Bestop saddlebags-Member of the United Four Wheel Drive Association and Blue Ribbon Coalition, †John 3:16†

RIP Mrs. yoda13... My life is better for having had you in it and you made me a better man...I can't wait to see you again...I love you always and forever, and for all eternity


If you want to help the sport of off-roading, and protect your right to do so, please visit the Envirobeat
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