i have got a set of 31x10.50x15 all-terrains and i was wondering what should my tire pressure be for mud and what should it be for rock?

 

ou will have to determine that.... there is no way any of us could easily guess b/c we don't know your rig, what kind of rocks, what kind of mud, the weight you are hauling, etc etc. just get off your butt and away from the puter and experiment some. i wouldn't go any lower than about 12-14psi with 15" rims and no less than 15psi with anything else. really whatever psi you use in the rocks should help just as much in the mud.

-cutts-

 

What he said.

I played in the snow a while back, went down to 15, worked great.

 

I've dropped as low as 20 out in the sand.....

Correct me if I'm wrong.....but I believe the greater the load range of your tire, the less you can drop the pressure. The stiffer side walls dont flex as much as lighter load tires. Therefore the high load range tires might loose the bead without enough pressure.