Originally Posted by JEEP THRILLS

80 and the tire will last alot longer, will be a bit stiffer but you're in a jeep. the main reason for the high pressure is because the tire has a load rating and it can only handle this load at 80

Originally Posted by AZJeeper

Don't know which Toyo this is, but the Open Country M/T is Load Range E (stiff sidewalls to begin with) and the Max Load = 3,970 lbs at 80 PSI

You didn't say what JK you have, but the curb weight of the 2-door is 3,849 lbs. One tire at 80 PSI is enough to support the whole Jeep, so here are my helpful suggestions:

• Sell three and run one at 80 PSI.
• Run 4 at 80 PSI and haul 12,000 lbs of cargo.
• Lower the pressure to about 20 PSI and do the chalk test to find the best running pressure.

That's one mighty over-built tire for a JK!!