Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > Suspension/Driveline/Brakes/Wheels/Tires

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 01-26-2012, 04:05 PM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Dec 2011
Location: Orange County, CA
Posts: 45
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1158
kc92886 is on a distinguished road
How Low Should You Go? (PSI)

I've had a lot of success going with 20 PSI in really fine sand (think dunes). I would imagine you might need some bead lock to go much lower than that. What is everyone's take on this?
__________________

__________________
Reply With Quote
  #2  
Old 01-27-2012, 10:32 AM
Bmwister's Avatar
Member
 
Join Date: Oct 2010
Posts: 546
Thanks: 11
Thanked 13 Times in 9 Posts
Rep Power: 2152
Bmwister has a reputation beyond reputeBmwister has a reputation beyond reputeBmwister has a reputation beyond reputeBmwister has a reputation beyond repute
Re: How Low Should You Go? (PSI)

It is not an exact science and truly more like trial & error off road. It depends on the tire and how much sidewall height you have. Some tires have too soft a sidewall and if they are aired down too much, you can end up bending a wheel rim and/or losing the bead if you encounter something hard buried in the sand. Alternatively, you can get too aggressive 4-wheeling and pull the bead on a hard turn which can provide you with the unpleasant experience of changing a flat in the sand. Let us know what size tire you have and that 20psi works in sand; it helps others calculate limits and risk threshold, so thank you for your info.
__________________

__________________
An expert is one who knows more and more about less and less until he knows absolutely everything about nothing.
---
2013 GC Ltd Hemi (2nd Jeep)
Reply With Quote
  #3  
Old 01-27-2012, 10:48 AM
JeepCoop's Avatar
Senior Member
My Jeep: 2007 5.7L WK
 
Join Date: Oct 2010
Location: Los Angeles, CA
Posts: 6,750
Thanks: 360
Thanked 75 Times in 72 Posts
Rep Power: 1892694
JeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond repute
Re: How Low Should You Go? (PSI)

Been down to 15ish in the sand...just DO NOT take turns fast or youll roll or blow out the tire off the rim. And if you do blow it off the rim, the best and coolest way to get it back on is a little bit of gasoline inside the tire, light and BAM science takes over! Seen it done once!

SO COOL! haha
__________________
[SIGPIC][/SIGPIC]
|Build Thread

Reply With Quote
  #4  
Old 01-27-2012, 10:57 AM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Dec 2011
Location: Orange County, CA
Posts: 45
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1158
kc92886 is on a distinguished road
Re: How Low Should You Go? (PSI)

I'm loving that set up Silver Surfer. Right now I'm running Yokohama Geolander AT/S 265/60/18. At 20 PSI I was able to handle all of the dunes in the Johnson Valley area, as well as a lot of rocks on some of the trails. I was nervous about the rocks, but did not have any problems.
__________________
Reply With Quote
  #5  
Old 01-27-2012, 11:19 AM
JeepCoop's Avatar
Senior Member
My Jeep: 2007 5.7L WK
 
Join Date: Oct 2010
Location: Los Angeles, CA
Posts: 6,750
Thanks: 360
Thanked 75 Times in 72 Posts
Rep Power: 1892694
JeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond reputeJeepCoop has a reputation beyond repute
Re: How Low Should You Go? (PSI)

Thanks KC!! Nice sounds like fun. Pics?!
__________________
[SIGPIC][/SIGPIC]
|Build Thread

Reply With Quote
  #6  
Old 01-30-2012, 10:48 PM
Member
My Jeep: 2011 5.7L WK2
 
Join Date: Dec 2011
Location: Orange County, CA
Posts: 45
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1158
kc92886 is on a distinguished road
Re: How Low Should You Go? (PSI)

The first pic is on the dunes BEFORE I've aired down.

The pic from far away is when the tires were running at 20psi, although it's impossible to tell from that distance.

These are the only ones I have with the 18's. Everything else is with the 20's which I'm no longer running.
Attached Images
File Type: jpg DSCN4232.jpg (199.2 KB, 22 views)
File Type: jpg DSCN4261.jpg (528.2 KB, 20 views)
__________________
Reply With Quote
  #7  
Old 02-02-2012, 04:33 AM
OzTJ's Avatar
Member
 
Join Date: Mar 2011
Posts: 141
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1530
OzTJ is on a distinguished road
Re: How Low Should You Go? (PSI)

I've run the 20" overland wheels at 17psi no problem on the sand, but as mentioned above I wasn't exactly hammering along, just taking it easy.
__________________

__________________
[SIGPIC][/SIGPIC]

RED 2004 TJ
5.5" Rubicon Express Tri Link Long Arm, 35" Baja Claws, F & R ARBs, Teralow

"Ordered 18/3/11" Mineral Grey 2012 Grand Cherokee Overland
5.7L HEMI, Quadra Lift, Quadra Drive II, Black on Black Olive Wood
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How Low Can You Go? moosehead Suspension/Driveline/Brakes/Wheels/Tires 56 07-18-2011 10:03 PM
265/35/22 psi JRsmoothee Grand Cherokee - WK 13 04-27-2011 07:26 AM
What PSI are you guys running? babygorilla Grand Cherokee - WK 15 04-08-2011 02:31 AM
Stuck in 4 Low lucky13 Grand Cherokee - WK 4 12-28-2010 01:22 AM
Is TPMS off by about 3 psi? JoeSchmoe007 Suspension/Driveline/Brakes/Wheels/Tires 11 10-31-2010 05:02 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 10:47 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by Chrysler Group LLC.