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How low can I drop the air pressure in my tires and not worry about the tire popping off the bead. Stock Moabs, 33 11.5 MTR Kevlars.
 

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Test it and see-that's the best way. Depends on a LOT of variables. That said, the factory Moabs hold a bead better than any other wheel I've run. I regularly go to 8psi and do fine. At 6 psi however, it gets dicey as to whether or not I'll blow a bead. Mountainous terrain, lots of ledges, roots, rocks, etc, very steep and very off-camber. In sand or snow, I'll just pull the stem and wait for them to inhale air, then go. Sand/snow is very forgiving for air. If you do blow a bead, Co2 works great, as does any air source, even a bike pump in a pinch if need be-though it will take a LOT of pumping to get it to seat.

Best of Luck,

Mike
 

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You will be surprised how hard it is to break a bead with no air pressure. The best way to test is to do as Mike said and keep trying until the bead breaks. Where I wheel, I tend to say between 10-15psi and imho, consider 8 to be the limit .
 

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Discussion Starter #4
Thanks I will keep that in mind fellas!
 

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I recently tried to break the bead on a golf cart tire by stepping on the totally deflated sidewall. Nope. Had to use my five pound hammer with several good whacks to break the bead.
 

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will0856 said:
How low can I drop the air pressure in my tires and not worry about the tire popping off the bead. Stock Moabs, 33 11.5 MTR Kevlars.
Sorry to change topics, but what metric size did you get and are you happy with the ride? I really want those tires, but don't want another load E tire. I know the 315 is Load D, but I believe both the 285 and 305 are Load E.
 

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I've had my stock Rubi tires to 9 lbs twice on the John Bull Trail in So Ca. I never broke a bead. Tires were like jello.
 

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I usually run between 6-8 lbs normally. I have never had a problem. What I watch out for usually is when I get a tire wedged down in some rocks and it is pushing the sidewall in. That's the only time I have really been worried but have been successful so far!
 

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dpendergraph said:
I usually run between 6-8 lbs normally. I have never had a problem. What I watch out for usually is when I get a tire wedged down in some rocks and it is pushing the sidewall in. That's the only time I have really been worried but have been successful so far!
X2

:D
 

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Discussion Starter #10
285/75/R16 they are a load range E but they do not ride that much different than my stock MTRs. And these are only the second pair of tires I've had on my jeep so I really do not know anything different. I like the tread pattern.
 

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Around 12, pre-beadlocks. 8-10 beadlocks.
 

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I usually go 6-8...no beadlocks here, never popped a bead. I do watch tire placement in the rocks..for the most part. :lildevil:
 

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It's hard to pop a bead unless you are being whinched and the whincher is off to the side. I run my kevlars at 8 and have never wanted to go lower. If you have a nice day in driveway air down all four tires to various psi and see how much bulge you get. I didn't see enough of a difference between 8 and 2 on mine to give the peace of mind I have with 8psi.
 

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When I had C rated 33" tires on 10" wide rims I would pop a bead at 12# if it caught a rut just right. Moved to 8" wide rims and had no problems at 8# to 10#. I now have 35" C rated tires on 9" wide rims and go down to 10# to 12# and have been as low as 6#.
 

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I've run no air at all and driven on the roads (although I do not recommend). 37" Pitbull Rockers (very stiff) on AEV Beadlocks. On Moabs I would go with what others stated, probably stay around 8, better safe than sorry.
 

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4-5 psi with hutchinson beads
 

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I run 34x10.50 LTBs on moabs at 10 on the LJ. They flex very well, and never popped, but have a bead larger than most regular mud tires. The bad thing about pushing the limits is, it will pop, at the absolute worst (hardest) moment/place on the trail.
 
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