how much to air down?
Thread Starter
Senior Member
Joined: Mar 2009
Posts: 979
Likes: 0
From: Tucson, AZ
Year: 1991
Model: Cherokee
Engine: 4.0
Hey im not exactly sure how much to air down, im told usually 10-15 psi, but see i have a 15 by 7.5 rim with 32x11.5 tires, i dont wanna air down too much since the rim is small, and i dont have beadlocks.... any suggestions
Senior Member
Joined: Jan 2008
Posts: 578
Likes: 0
From: Cheyenne Wyoming
Year: 1998
Model: Cherokee
Engine: 4.0l
Lowest I have ever went is 15, and that is on the rocks in CO. I haven't had any issues and most of the "gurus" I go with say that is fine.
Last edited by afbond03; Mar 22, 2009 at 09:54 PM.
Thread Starter
Senior Member
Joined: Mar 2009
Posts: 979
Likes: 0
From: Tucson, AZ
Year: 1991
Model: Cherokee
Engine: 4.0
oh really, ok well thats fine yeah i heard 15 was the ideal psi but i jus didnt want to go too low since my rim is not that wide, dont wanna have a popped out rim and tire in the middle of the texas desert, lol
Trending Topics
Senior Member
Joined: Oct 2008
Posts: 544
Likes: 0
From: Orlando FL.
Year: 1996
Model: Cherokee
Engine: 242 6cyl
I was also wondering how far to air down on my 235/75/15's AT's the lowest i have been so far is 15 and it seemed to be fine for the mud/sand since fla is full of it lol......
Thread Starter
Senior Member
Joined: Mar 2009
Posts: 979
Likes: 0
From: Tucson, AZ
Year: 1991
Model: Cherokee
Engine: 4.0
CF Veteran
Joined: Nov 2008
Posts: 7,874
Likes: 100
From: Northern Ontario, Canada
Year: 1990, 1999, 2000
Model: Cherokee
Engine: 4.0
don't forget tho, tire sidewalls have a lot to do with it. if you have a heavy sidewall that doesn't flex much, you can go lower, as with new tires will be more stiff as well.
what tires are you running? how many ply is the sidewall?
what tires are you running? how many ply is the sidewall?
aka Wade-O
Joined: Dec 2008
Posts: 3,703
Likes: 10
From: IN
Year: 1989 Comanche
Model: Cherokee
Engine: 4.0
the tire has alot to do with it.
my 32's were kumho mt's
i have run 37x13.5 bogger on 10" wheels at 6 psi
37x12.5 creepy crawlers at 5 spi on an 8" wheel
36x 12.5 swamper tsls couldnt hold a bead at 10 psi for some reason on an 8" wheel
36 x 13.5" iroks at 5 on a 8" wheel, (2 on the beadlocks)
my 32's were kumho mt's
i have run 37x13.5 bogger on 10" wheels at 6 psi
37x12.5 creepy crawlers at 5 spi on an 8" wheel
36x 12.5 swamper tsls couldnt hold a bead at 10 psi for some reason on an 8" wheel
36 x 13.5" iroks at 5 on a 8" wheel, (2 on the beadlocks)


