what's the fastest you will drive on low air pressure on pavement?

a few local places it's alot easier to unload and drive the last 10 miles up on the road... and coming back down is sometimes hecktic @ 2-3psi, just wondering what's the fastest some of you would drive on trail pressure on pavement...

I drove all over Moab for a few days at 5~ or so. Went up to about 40-50 mph to get to our campsite just south of town. Not a problem, but Moab is FLAT :D

33x12.5 TSL's BTW

i also ran in town moab 5-6 psi , SSR 35 12.50

Once, coming down the hill from Ballarat to the bustling metropolis of Trona, I hit 65 on about 9 lbs of pressure. The rig developed the worst death wobble ever. Now I air up whenever I know I'll be going faster than 30ish on pavement.


Dave

On ssr's I can drive 60 mph no prob. On boggers it is really scary to drive faster than 30mph at 5-10psi. So I would say it kinda depends on your rig and what tires you're running.

so the concensus is a narrow windy no shoulder's mountain road @ 55+ is a bad idea??

but i can say the toy ride's like a caddy @ 75 on 2-3psi :D must be those massive sidewall's and the turbo :D

people doing it does not make it safe for you or the tire. the #1 cause of a trailer tire is low pressure. People don't check the pressure in there boat trailer tires and withg low pressure the sidewalls heat up and Boom, blow out. That is why you do not drive hwy speed with low pressure, not the death wobble ect, it's the heat.

It also matters if radial or bias tires. Radials are a lot more forgiving of low pressure. Most trailer tires are bias....

Originally posted by seajeeper
It also matters if radial or bias tires. Radials are a lot more forgiving of low pressure. Most trailer tires are bias....
correct, trailer tires are supposed to be bias too;)

I used to regularly hit 75 mph on one downhill spot with my 33x15.50 SX's at 5 lbs. so I could make it up the other side of the hill faster on the way to the next trail back when I had IFS. As long as theres no sharp turns and you know how to adjust your driving with the tires this low then I think whatever you feel is safe...is safe. Hitting 80+ diffinately wouldnt have felt safe.

Now that my rig is much taller and has larger diameter tires theres no way Id go that fast again. Just letting you know Ive hit high speeds before with low pressure and at no danger.

Originally posted by Hobsdaddy
I used to regularly hit 75 mph on one downhill spot with my 33x15.50 SX's at 5 lbs. so I could make it up the other side of the hill faster on the way to the next trail back when I had IFS. As long as theres no sharp turns and you know how to adjust your driving with the tires this low then I think whatever you feel is safe...is safe. Hitting 80+ diffinately wouldnt have felt safe.

Now that my rig is much taller and has larger diameter tires theres no way Id go that fast again. Just letting you know Ive hit high speeds before with low pressure and at no danger.

did you read my reply? just because you have done it does not make it safe....damn internet and bad advise......

I like 35 max at around 10 psi... Could probably go faster, but why risk it?? The low pressure causes the tire to heat up dramatically, and even if it doesnt blow, it can cause the inner plys to separate... more on the radials than the bias plys.

#1 defective warrantied tire at my last job where we sold them = Swamper 36x12.5R15 Radial,
#2 Swamper 38.5x15.5R15 Radial,
#3 37x12.50R15 SSR Swamper radial.

I regularly hit 40 to 50 mph at 1 to 2psi. (can you say EXTREME understeer?)Only on the trail in the snow. It's also cost me a set of brand new 38x15x15.50 cepecks, due to the overheating and resulting bubbling of the sidewalls. I have done it long enough to make the sidewalls steam in 20* weather. Needless to say, If (when) I do it now I don't keep speeds high for sustained periods of time. On road I think it's totally stupid. Like darren stated- heat kills tires, and driving at speed with low pressure generates tremendous amounts of heat.

threads without pics suck so... airing down is good!

did you read my reply? just because you have done it does not make it safe....damn internet and bad advise......

did i say what i did was safe? no i said...

As long as theres no sharp turns and you know how to adjust your driving with the tires this low then I think whatever you feel is safe...is safe.

thanks.

Originally posted by Aggro
I regularly hit 40 to 50 mph at 1 to 2psi. (can you say EXTREME understeer?)Only on the trail in the snow. It's also cost me a set of brand new 38x15x15.50 cepecks, due to the overheating and resulting bubbling of the sidewalls. I have done it long enough to make the sidewalls steam in 20* weather. Needless to say, If (when) I do it now I don't keep speeds high for sustained periods of time. On road I think it's totally stupid. Like darren stated- heat kills tires, and driving at speed with low pressure generates tremendous amounts of heat.

threads without pics suck so... airing down is good!



cool pic......pun intended:p

Originally posted by Hobsdaddy


did i say what i did was safe? no i said...



thanks.

Whatever he feels is safe is safe ....no if he feels 50 is safe on a stright road, it will still heat up the sidewalls and ruin the tire, we are not talking about how it will handle, please try to understand, I am not posting to get you upset, I am posting to tell the truth in facts.

fact:trailer tires can be bought in a radial design.

fact: i use bias on trailers.

Originally posted by larryboy
fact:trailer tires can be bought in a radial design.

fact: i use bias on trailers.

I know they make them, but I hear bias tracks better.

I ran my swampers down the freeway at 2 psi on beadlocks .
When I got off the freeway and the the tires started to cool they sucked into a vacuum and went flat. :rasta: So there I was, airing up along the side of the street. 6 psi. won't do that.

Whatever he feels is safe is safe ....no if he feels 50 is safe on a stright road, it will still heat up the sidewalls and ruin the tire, we are not talking about how it will handle, please try to understand, I am not posting to get you upset, I am posting to tell the truth in facts.

Thanks for giving a educated reply instead of a smart ellic one that most people give.

I understand the theory of the sidewalls heating up and blowing under low pressure, Ive had this happen to me once on my dads cherokee and once in the university van. I guess I need to be more clear on what I mean. Around here you have to jump onto roads and highways a lot to get to trail to trail, there spread out a lot...so a lot of guys I know are forced to run moderate speeds with low pressure. And Ive never heard of anyones sidewall blowing out...doesnt mean its safe, but just what ive observed.

I also felt with the strength of the SX sidewall I could acheive higher speeds at low pressure and not worry about sidewall failure.

But, like the point your making, better safe then sorry.

Originally posted by Hobsdaddy


Thanks for giving a educated reply instead of a smart ellic one that most people give.

........

But, like the point your making, better safe then sorry.

I don't make smartass replies anymore........it's rude and I'm tired of seeing others reply like that too, no need to be rude just because it's "por"

i was being a smart ass....since you(seabass) said you were posting facts. I can't beleive someone thanked you(seabass) for not being a smart ass:eek: :eek: :D . whats this world coming to.

I don't make smartass replies anymore........it's rude and I'm tired of seeing others reply like that too, no need to be rude just because it's "por"

Seabass, You've got a damn good attitude and my respect for you just went up (not that I had disrespect for you before...I just never thought about it).:)

I remember a tire article in a 4x mag where someone from BFG said no way should their MTs, ATs, etc. be run on pavement under 20 psi. As already stated, bias ply tires heat up quicker.

I've done it though, but in hot weather I've driven on the side of the road with flashers on at about 30mph.

In cooler weather I've driven with about 8 or 9psi up to about 40mph or so.

It's a lot safer if you're driving any distance to air up.

Originally posted by larryboy
i was being a smart ass....since you(seabass) said you were posting facts. I can't beleive someone thanked you(seabass) for not being a smart ass:eek: :eek: :D . whats this world coming to. :laughing: :laughing: :laughing: :laughing: :laughing: :laughing: :laughing: :laughing:

Street pressure for my 37 SSR's was 17 lbs rear and 25 lbs front. I usually air up for pavement, since I have a tank, but I've gone 50 mph in the snow with 2 lbs in the tires, on winding roads.

I drove about 2 miles today to a local pit @ 0 psi and hit 40 mph. May not be the smartest thing to do, but within my limits.

Are you talking about the shootin' pit over by capitol forest?

nope,different one