|03-27-2009 11:24 AM|
|innocent bystander||Ride into work this morning with morning was MUCH MUCH better. At 35psi, the ride was very very good. I am dropping to 30psi for the ride home. I work at a wind farm, so the road in is pretty rough in most places... so it is a good test.|
|03-27-2009 10:51 AM|
jerry knows his stuff..
all the old guys in my jeep club runs their psi at the MAX tire pressure.. really ticks me off, they get crappy with me when i air up to 25-27 psi.. then my gfs dad wonders why my jeep handles 10x better than his and his daughters.. well they shouldnt be airing up to 45-50 psi..
heck ive stated this more than once.. they even get mad at me when i air down to 12 psi when offroading.. they air down to 20-25 psi when we go out offroading.. im like WTF.. but then again im 21 (in 6 days) and they are almost 50.. what do i know about jeeps? ive just been driving around in one since i was 14 and done EVERYTHING to it besides rebuild the tranny when it went out.. heck when i first got with my gf, her dad and i got to talking and he said he saw me driving my jeep (when i was 16) and he had to get one, this was 4 years before i met his daughter and him.. we'd pass each other EVERY day on my way to school LOL.. hes had his jeep longer than most in our jeep club too
|03-27-2009 09:06 AM|
|Atthehop||I have 30x9.5 15's BFG AT's and found that 23 all around gives the best ride and wear. In fact I am still running 2 from my YJ on my TJ and the TJ has almost 70k. My guess is these have 85-90k on them and still have plenty of tread. Keep in mind I run 100 miles a day commuting on almost all highway.|
|03-27-2009 08:33 AM|
|steamnsteel||The chalk test is the best way to find your optimum tire pressure. In my case with the tires I have now 25 psi for an all around tp gives me full contact and I gain 3 psi while road driving.|
|03-26-2009 11:57 PM|
|innocent bystander||Thanks for the tip Sb. I will play around a bit more. I think I am onto the cheapest wander fix ever.|
|03-26-2009 11:26 PM|
|03-26-2009 08:47 PM|
|tdm||Jerry, thanks for the great tip...I'll give it a shot tomorrow|
|03-26-2009 08:43 PM|
Wow. I am actually at 35 right now. I will try coming down to 31-32 tomorrow after my drive to work.
Is it plausible that the super high pressures found in my front tires would cause that disgusting bump steer?
|03-26-2009 08:02 PM|
|03-26-2009 07:46 PM|
|tdm||Peaked my interest Jerry...chalk test???|
|03-26-2009 07:23 PM|
But for 15" wheel radial tires where a C Load Rating is common, these are close...
35" 25-26 on the street
The first figure is for an unloaded Wrangler, the second is for when it is fully loaded.
Bias belted tire pressures will be lower...
Those are just ballpark figures. If you want to run the chalk test, you can get a better idea for what works best for your particular tires and weight of Wrangler.
|03-26-2009 07:08 PM|
|Jma20a||good to know, thanks.|
|03-26-2009 07:06 PM|
The pressure molded into the sidewall is only that tire's maximum allowable air pressure to be used only when the tire is carrying its maximum allowable weight it can support without failure. Since a Jeep is nowhere near that weight, usually only about half of that for safety reasons, you should never run the pressure on the sidewall. That's why tires on a Jeep may say 50 psi on the sidewall, for example, but the recommended tire pressure typically on the doorjamb sticker is only perhaps 30-31 psi.
The heavier the vehicle, the more tire pressure you need. The lighter the vehicle, the less air pressure that should be run. The correct tire pressure is dependent on the tire size, load rating, and weight of the vehicle, not the maximum allowable air pressure that is molded onto the sidewall.
|03-26-2009 07:03 PM|
|Jma20a||i run the psi written on the side of the tire, im sure they put it there for a reason.|
|03-26-2009 06:51 PM|
|IslandTJ||I personally run 28 psi on the street and 10-12 psi while off-road. Jeep runs nice on 33x10.5 BFG MTs on stock Gambler wheels.|
|03-26-2009 06:21 PM|
|jamesbernatchez||That would be helpful!|
|03-26-2009 06:13 PM|
|Sb5551||Jerry, for everyone do you mind posting what you recommend for the basic tires 31,32,33,35. I have always wondered and I know everyone respects your opinion.|
|03-26-2009 06:11 PM|
|03-26-2009 05:53 PM|
|03-26-2009 05:39 PM|
My jeep is not a DD. So after airing down while out wheeling I would park it at home and run around in it every now and then. With 15 pounds of air it was a smooth ride. I would air them back up eventually though. However, those few rides took a tole on my tires. The tread on each tire started to wear very uneven. Fortunately/unfortunately someone decided they wanted my Jeep more than me and stole it. I got it back with no wheels and tires. So have new rubber on there now.
Cliff notes…while on the road, run your tires at what the manufacturer recommends, not wants rides the best.
|03-26-2009 04:59 PM|
|innocent bystander||Having never had a vehicle with tires of that size, tire pressure becomes an afterthought. Buy a nice gauge and keep in the Jeep. I am now a believer in all this tire pressure talk. I always thought that my body was not calibrated enough to sense a difference in tire pressure.|
|03-26-2009 04:56 PM|
|jamesbernatchez||Good to know. I am getting my Jeep on Saturday and totally forgot about checking the tire pressure.|
|03-26-2009 04:47 PM|
Tire Pressure - Remedial Review
Thanks for all your help on the other thread I started. I just wanted to start another thread for the newbies (like me). Tire Pressure.
Bought my Jeep a few weeks back, and it is a blast. Having driven a few before, I knew what to expect. Noisy, rough ride, etc, etc. Big deal. What I didn't expect was how much the thing would be all over the road. It seemed to bump steer pretty bad.
I have read a ton of things and was preparing to start replacing all kinds of stuff, even though inspection of components didn't seem to show anything as being wrong.
Finally weeks into thinking it was just a "Jeep thing" I noticed my tire print on light layer of mud on the road to work. Seemed like not all of the tires had a full "footprint" layed down.
Having just bought it, I ASSUMED that tire pressures were, you know, taken care of by the dealer. Just the same, I went out and bought a nice tire guage and started checking pressures.
RR - 35psi
RL - 30psi
WTF??? At that time, I didn't even know where to begin with them. I put them all at 40psi, came home, got on this forum and saw that people seem to like anywhere from 27-35psi. I adjusted to 35 and boom. Rides betters. Steers properly (no bump steer). I can drive with one hand now. Quieter ride (for some reason).
DO NOT OVERLOOK TIRE PRESSURE AS THE #1 SOURCE OF WEIRDNESS ON YOUR RIDE.
That said, I have Goodyear MTR (I think) mounted on Rubicon wheels. 245/75x16. Anyone have a recommended pressure for that set up?
Thanks for reading. I feel like an idiot. I will now fade into the mist.