I recently purchased my Liberty. The previous owner put 31" MT/Rs on it. He told me that the current tire pressure was 75 PSI. This seems high to me but that's really just based on my previous experiences/knowledge. I haven't taken the time to check the tire pressure but wanted to get everyone's opinion before I did. What would be the appropriate tire pressure for my Jeep for onroad activities?

Look on the sidewall of your tires... in small print, should have the max tire pressure listed. Appropriate pressure is going to vary from tire to tire based on what is designed to do. Heavy duty towing or off road tires run higher PSI than street tires. I run my Firestones at 41 PSI rear, 38 PSI front (max 44 PSI on the sideway) for mpg and towing reasons (less sidewall flex at higher pressure).

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2006 Liberty CRD Limited
Mopar engine, transmission, transfer case skids
245/70/16 Michelin Latitude X-Ice (winter)
235/75/16 Firestone Destination ATs (summer)
Thule roof rack, cargo box
V6 airbox mod
Flowmaster 50 2.5 inch muffler
Edge EZ module (set for fuel economy)
SEGR
TDIWagonGuy CCV filter
B99 (summer), B20 (winter)

Max PSI is 80 lbs. I'm just looking to get an idea of what others run with MT/Rs or similar tires.

It's seems the best rides and wear with the MT/R's on a KJ is at about 38-40psi.

Thanks tjkj2002.

Good news! I had a rotation done today and had them drop the tire pressure to 40 lbs. and my TPMS gauge went off. Woot!