While researching tires for my wife's JGC, I came across this article. I thought some might enjoy reading this.

http://www.tirerack.com/tires/tests/testDisplay.jsp?ttid=85

BTW, I am replacing her Wrangler ST tires with P245/R75-16 Wrangler RT/S tires. They are the same tire--only bigger--than what is on my XJ. It has been an excellent tire for my type of on/off road use, averaging close to 70,000 miles per set.