bigin2009

anyone know what a good air pressure to run on the street? these tires are harder than a brick with no air in them! lol

xj jeepman

10 maybe, other people will add to this..

LCFRJEEP

Stick to the stock rating. I think between 35-40 psi.

BowtieGuy3

Whatever the side wall says.....maybe a few #'s less for grip, a few more than that for grip in winter...

MOSendero

How do you figure getting better grip in the winter by increasing PSI?

I generally run 5-10 psi less in the winter especially when it is iced up as it is right now here. I feel I increase traction with the larger footprint of the tread and it comforms to the surface better.

Right now I'm at 25 front and 20 rear on 31 radial AT's.


Just curious.


MOSendero

offroadohio

You DO NOT want to run what the sidewall says, that is MAX psi. generally you want to stick to what the vehicle calls for regardless of the type/size of tire. More air equals less grip and better MPG, less mans more grip and less MPG

Goign to low can cuase excessive heat and cuase the tire to blow out. Too much air and it can explode as the tire heats up and raises PSI.

You lose 1 psi for every 10 degrees the tire temp drops. Gain 1psi for every 10 it goes up.

wicked_xj

24 it will ride like a caddy

bigin2009

Iv got them set at 25 there still harder than a brick! lol

wicked_xj

22 as low as i would go what size is the rim and tire?

76ANTHONY

to answer this with a bias opinion, you will get a larger footprint with less air, yes, butttt remeber when you turn what your tires do, they take the weight and what does that do when you have less air, they flex more. in the winter with snow on the ground that flex will cause your vehicle to slide because of weight
do you kinda get what im saying?

XJ?2010

DONT run them high i know a guy that scuffed a curb when them at 37psi it blew a hole in the sidewall bottom line they could'nt be patched

that was a 37" too

BuckB91XJ

With a small light weight rig like an XJ, with oversized tires, you won't need to run the PSI stamped on the sidewall of the tire. I would start with 35. wet one of your tires and roll the rig fwd on a dry driveway. See how much of your tread is actually contacting the road. Let the air out 5 PSI at a time until the entire width of the tire makes contact and adjust all of your tires to that pressure. If you run anything more or less, your tires will wear wrong and you will have less tire contacting the road thus, giving you less traction.

ktmracer419

i ran my 36's at about 24 on the street.

and they rode like crap no matter what pressure I ran

BuckB91XJ

An agressive tire will run rough on the street, especially with a light weight rig. Nothing you can do about it. They sure go good off road and look really cool, though.

Irongrave

I run mine at 25-30 on the street they will be rough because of the type of tire it is, but its hard to beet off road