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Topic Review (Newest First)
10-01-2010 10:35 AM
jgorm Mine doesn't really "smooth out" until i get into the teens, and that is too low for the corners. I run about 22 psi and it helps some, but not a ton. I have skyjacker shocks and they are too stiff unless i have the hardtop on and a bunch of gear. I'm thinking about going to bilsteins on the back to test it out (the back rides way stiffer than the front for me.
09-30-2010 07:08 PM
Sdac626 god i love this forum!!! i was thinking my jeep rode really rough too and was wondering what to do about it! good quick/easy/free way to go!
09-30-2010 06:36 PM
IIx4 First..Tire pressure helped a bunch for the ride quality. Second...I threw the P.O.S. ES3000 shocks in the trash and bought some new Bilstein 5100's. WORLD OF DIFFERENCE!!
07-11-2010 11:33 AM
jp'rs_peep'rs I continue to choose the air pressure for "Silver" that works for me.

C.
07-09-2010 12:48 AM
Darth Vader My '97 jeep has always had the problem of an exceptionally rough ride since I bought it last September. Even the smallest of bumps on a dirt rode is accompanied by a slamming noise. The tire pressure is the last thing I ever would have suspected though. My dad swears up and down that the shock absorbers are bad based on the fact the Jeep apparently creaked when I hopped on the back bumper, but only one shock absorber has been leaking oil. Is there any easy way to confirm that the rest of them are bad?
07-09-2010 12:04 AM
Son of Siam Thanks for the info. I am running a 33x12.50x15LT BF Goodrich A/T. I bought my Jeep with a RC lift already installed, so I can guess from reading on the forum that airing down wont be the big fix. Granted I do not even want to open that can of worms in this thread. I'm just saying...
07-08-2010 01:57 PM
DelsJeep BTW to the original poster, i've ridden in a tank and they're not that bad.
07-08-2010 01:54 PM
lancetkenyon You will actually get BETTER milage out of your tires. You will be riding on more contact patch width, so the center will not wear out as fast.

Good way to tell.......draw a chalk mark across the entire width of your tire at your current PSI. Drive in a straight line for a couple revolutions of the tire. Get out and see where the line is worn off. I am betting it is about 60% of the actual width, right down the center, and leaves the chalk mark a couple inches on the outer edges. Now air down a couple PSI and repeat until the chalk mark is touching all the way across. This will give the best TIRE WEAR. It will have a very slight detriment to the MPG though, like maybe 20 miles less to a full tank?
07-08-2010 01:38 PM
DelsJeep Thanks Jerry! I'll try it out and see how she runs. Lower pressure isn't going to wear my tires prematurely is it? A/T tires aren't cheap.
07-08-2010 01:35 PM
Jerry Bransford
Quote:
Originally Posted by DelsJeep View Post
Firestone Destination A/T LTR 30/9.5R15 C
That's pretty much a factory size tire, 30-31 psi is fine for that size tire. The factory recommends 33 psi for that size only when the Jeep is fully loaded with passengers and gear.
07-08-2010 01:33 PM
lancetkenyon Recommended PSI on the tires is MAX pressure. Should only be using this when towing or heavily loaded. Try going down 5 PSI, and go down 1 PSI each time you drive. You will find the sweet spot.

Just like airing down. Most people have no clue how far to go down with tire pressure when wheeling. I say start about 13 PSI, and go down 1 PSI every time you wheel. When you start burping air, go up 1 PSI and that is your optimal tire pressure.
07-08-2010 01:32 PM
DelsJeep Firestone Destination A/T LTR 30/9.5R15 C
07-08-2010 01:28 PM
Jerry Bransford
Quote:
Originally Posted by DelsJeep View Post
I commute with my Jeep a lot so I've kept the tires to 30s. It handles really well and doesn't seem to bounce excessively. What pressure should I be running? Because I'm pretty sure it's set to the recommended psi on the tires.
We can't tell you what pressure without knowing what size tire it is.

If you are filling your tires to the pressure molded onto the sidewall, that is never the correct pressure to use. That pressure is only the tire's maximum safe air pressure which should only be used when the tire is supporting its maximum permissible weight.

The proper tire pressure always depends on the size of the tire, its construction, and the weight of the vehicle the tire has to support, not simply what its max safe pressure is that is shown on its sidewall.
07-08-2010 01:17 PM
DelsJeep I commute with my Jeep a lot so I've kept the tires to 30s. It handles really well and doesn't seem to bounce excessively. What pressure should I be running? Because I'm pretty sure it's set to the recommended psi on the tires.
07-08-2010 12:21 PM
lancetkenyon You will never know until you try. You can always air back up if it gets too soft.
07-08-2010 12:19 PM
Jerry Bransford For 33" tires, and I used to, I'd run them at 26-27 around town. Maybe 28 for the highway if you're going for max fuel economy. The hard top doesn't add much weight but it does make you want to stay towards the higher end of the acceptable range of tire pressures rather than the lower pressures. The heavier the Jeep, the more psi you want for the same size tire.
07-08-2010 12:08 PM
Son of Siam I have a hardtop. Does that change what psi I should go down to considering the weight or is it not enough to worry about?
07-08-2010 11:44 AM
lancetkenyon
Quote:
Originally Posted by Son of Siam View Post
This forum will probably end up getting me arrested in my front yard but its 3:30 in the am and I just went out and let air out of my tires and went for a test run. It's amazing to hear how loud it seems to let air out at 3 am. Seemed to help the rough ride a bit though. Went down to 30psi from 35.
Keep going. Try 20-25.
07-08-2010 02:38 AM
Son of Siam This forum will probably end up getting me arrested in my front yard but its 3:30 in the am and I just went out and let air out of my tires and went for a test run. It's amazing to hear how loud it seems to let air out at 3 am. Seemed to help the rough ride a bit though. Went down to 30psi from 35.
07-08-2010 01:57 AM
Son of Siam How much does airing down affect gas milage?
07-01-2010 01:52 PM
CubbieBlue Also that clanging noise you are hearing from the rear end is likely your muffler banging on something.

See if it is hitting your rear shock.
07-01-2010 01:18 PM
Yagermeister Glad I saw this post. The ride in my new (to me) TJ was pretty rough but I just put it off as how a lifted Jeep should feel. Checked the tire pressure when I went home for lunch today... the PO had them at 44psi! (I have 33's). Even the max rating on the sidewall is 35! I brought them down to 28psi and the ride back from lunch was MUCH more comfortable.
07-01-2010 09:11 AM
lancetkenyon 27-35 PSI??? Wow. I drove my 32s, 35s, and 37s on the road at 18-20 PSI.
07-01-2010 01:33 AM
IIx4 Thanks for the info on tires. Totally new info to me.. Definitly a NEWBIE..

I have a 4" Pro Comp Stage 1 kit on my TJ and agree that the ride seems extremely rough. A good bump in the road and you can bounce into the next lane!

Will post results to tire adjustment.
06-17-2010 11:47 PM
meatlord I run 24 to 26 psi on the street with 37x12.50 15 MTRs rides like a caddy on longarms. Either have it weighed and calculate the proper psi, or do the chalk method. So many people dont understand the concept of properly inflated tires/weight/contact patch. Definitely drop some pressure.
06-05-2010 03:25 AM
TJNewbie X2 I run 28psi on my BFG's, wears very well and rides smooth.
06-04-2010 05:45 PM
Jerry Bransford
Quote:
Originally Posted by RoSs View Post
yea im running 33's at 35 psi. Im gonna go drop the pressure to 27 and see how it feels.
Good decision, 35 psi is way excessive for that size tire.
06-04-2010 05:00 PM
JIMBOX Even though mine is a four door---

I have My Hankook Dynapro's (33.6") set at 28 psi and a set of RS9000XL's set at (5) for the street

The ride is so good, you can thread a needle on a rough road !!())

JIMBO
06-04-2010 04:54 PM
Hexxum Do you have the poly blocks for the lift with the pro comp shocks? That could make a difference too. You could be riding on very tight springs.
06-04-2010 04:48 PM
RoSs yea im running 33's at 35 psi. Im gonna go drop the pressure to 27 and see how it feels. The jeep also has like 3 different kinds of shocks. Whoever owned it before me was a complete moron i think. When i get the money ill invest in the Rancho 9000. Have heard multiple good things about them
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