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Old 01-14-2013, 09:17 PM   #1
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Talking best psi for off roading. and normal driving for 33s

I have 33"s and keep them at 34psi. Idk if its that's the right psi for my wrangler.. and I noticed that I only see wear or the part of the tire that's touching the asphalt is in the middle and not all around.. so I think I might have too much psi since its wearing around the center of the tire.. so what psi you use on your 33's! Off road and normal driving!

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Old 01-14-2013, 09:18 PM   #2
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I use 25 on my 35's

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Old 01-14-2013, 09:18 PM   #3
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I run 27psi in my 33" Duratracs.
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Old 01-14-2013, 09:22 PM   #4
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I run 13psi off road and 29psi on road
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Old 01-14-2013, 09:23 PM   #5
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I run 26psi in my 33" Dueler M/T's on the highway and 12psi off road (maybe a little less if really slippery).
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Old 01-14-2013, 09:25 PM   #6
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what would you guys reccomend for 285x75x16 bfg km2's on my tj?
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Old 01-14-2013, 09:32 PM   #7
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I run 28psi onroad and 14psi off road. 33x12.5x15 Falken Rocky Mountain ATS
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Old 01-14-2013, 09:42 PM   #8
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32 on road and 12 offroad
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Old 01-14-2013, 09:43 PM   #9
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33/12.5/15 BFG A/T I run at 21 psi on highway and roads, drop to 12 or so off road.
I have done trail rides, muddy sections and climbed sandy hills at the 21 psi as well.
Different conditions may benefit from different tire pressures.
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Old 01-14-2013, 09:59 PM   #10
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26-28 road, 12 offroad. 34 is WAY to high for a 33 and it probably rides like wagon wheels.
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Old 01-14-2013, 10:57 PM   #11
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15 off and 28 on
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Old 01-14-2013, 11:11 PM   #12
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29 on and 15 off. And NewYJ 21 lbs really? I would think it would handle like ass with that low a psi....
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Old 01-14-2013, 11:37 PM   #13
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33x10.5 KM2

Snow: 8-10 psi
Wet/Mud: 11 psi
General Offroad: 12 psi max

Street: 28 psi
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Old 01-15-2013, 01:09 AM   #14
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32x11.5 cooper stt:

snow: 9 PSI
dry trails 22 PSI
road: 27 PSI
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Old 01-15-2013, 02:01 AM   #15
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It's pointless for everyone to through out a PSI number hey run. Ever Jeep and tire combo is different. The I my way to determine what PSI YOU should run is to do the chalk test.

Your PSI is determined by your tire, the load range, air temp, how heavy your Jeep is, and what surface you're driving on to name a few factors.
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Old 01-15-2013, 07:21 AM   #16
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on my 33x10.5s I ran 30psi for on road and 10psi front with 8psi rear for Offroad. that was with out beadlocks
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Old 01-15-2013, 09:52 AM   #17
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'05 LJ 33x10.50 MTs on 7" wheels

I run 25 - 27 on road, depending on load, and 12 offroad.
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Old 01-15-2013, 10:06 AM   #18
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Quote:
Originally Posted by james_R View Post
I have 33"s and keep them at 34psi. Idk if its that's the right psi for my wrangler..!
34 psi is way excessive for that big of a tire, that is even excessive for the 30" factory size tires which only take 31-32 psi. And generally speaking, the bigger the tire, the lower the air pressure it requires. For 33x12.50 tires holding up a vehicle with the weight of a Wrangler, 26-28 psi is appropriate. Something like 26 psi for around town when lightly loaded, 28 psi when fully loaded on the highway... no higher than that.
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Old 01-15-2013, 11:00 AM   #19
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29 on and 15 off. And NewYJ 21 lbs really? I would think it would handle like ass with that low a psi....
Actually it handles fine, we have 75 mph freeway speed limits and no issues.

And I run with no trac bars or sway bar.
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Old 01-15-2013, 11:16 AM   #20
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And I run with no trac bars or sway bar.
Before anyone gets too excited about that, note he has a leaf spring YJ which does fine without either of those.
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Old 01-15-2013, 11:26 AM   #21
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Quote:
Originally Posted by james_R View Post
so what psi you use on your 33's!
I run 27.314159 psi on Monday and Wednesday, and 26.662606 psi on Tuesday and Thursday, and then 28.138064 psi on Friday through Sunday.

Quote:
Originally Posted by Brew View Post
Your PSI is determined by your tire, the load range, air temp, how heavy your Jeep is, and what surface you're driving on to name a few factors.
x2....
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Old 01-15-2013, 12:32 PM   #22
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Old 01-15-2013, 12:38 PM   #23
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Different tires require different pressures. My tires are 33x13.50 Toyo MT which is a very stiff tire. I run 20 on the street 10 off-road and 2 in snow and sand. I have never lost a bead at those pressures and have very even wear across the tread. I have 30,000 miles on them with 1/2 tread remaning so these pressures work for me.
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Old 01-15-2013, 02:28 PM   #24
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I run 27.314159 psi on Monday and Wednesday, and 26.662606 psi on Tuesday and Thursday, and then 28.138064 psi on Friday through Sunday.
.
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Old 01-15-2013, 03:12 PM   #25
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I run 27.314159 psi on Monday and Wednesday, and 26.662606 psi on Tuesday and Thursday, and then 28.138064 psi on Friday through Sunday.

x2....
I want your air gauge
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Old 01-15-2013, 04:23 PM   #26
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I run 25 psi on A/T's for road.
I think the mud terrains can do less??
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Old 01-15-2013, 06:21 PM   #27
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I run whatever is in them. Haven't checked them for a few months.
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Old 01-15-2013, 06:34 PM   #28
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I run whatever is in them. Haven't checked them for a few months.
lol ditto

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