im running 385/70/17 cooper st maxx i got my air pressure at 40psi atm max is 60 for the rim but 80 for the tire i was thinking of going to 35psi and running all winter with that set tire pressure i know for slush and crap the skinnier the better .what im trying to say is i wanna Not have to buy winters but if i do i do what u guys run lower air pressure in winter or a little higher for a stiffer tire.IM pretty sure less air for pure ice is better i belive but not 100% if u guys could chime in id apreciate

 

Personally I have found that running lower pressure in like the 32psi range has been more comfortable and handles well. When i had them mounted, the shop had them at like 50psi and they where a very jarring ride.

 

Yea when tires were new the put them at 48psi i put at 40 right away ill try 35 for a bit got 5cm of snow today and wet roads gonna freeze tonight ill try 35. On icy roads in the morning

 

I normally run around 30-35 depends on how Lon I wanna wait for the tire to air up

 

You need to know that the max tire pressure is at max load for the tire. Your jeep comes no where near the max load. 28 to 32 psi is a good tire pressure for all year around driving.

 

+1 on this. The ST maxx is an 'E' rated tire so it's made for a much heavier vehicle. If you do the chalk test, you'll find (at least on my JKUR with equipment) that 30 psi gave the best wear. The shop had them at 38 psi and was way too rough of a ride. I've been running these at 30 psi for 3,000 miles and they are wearing evenly and are quiet on the interstate. When off road, I drop them to 20 psi with no issues. I have found that these tires do GREAT in the rocks and beach sand. Haven't had them in the mud or snow yet.

 

Inches. ..

 

I do 33 in summer and probably put it at 31 for winter. Should be fine.