I have a 1999 Super Duty XLT Super Cab 4X4 with OEM LT235 85R 16 General Grabber AW tires on it. These tires are fine for highway use but are awful for off-road use. I am thinking of going with the Dunlop Rover RV's in this size or possibly going to the LT 255 85R 16. Has anybody tried these tires or sizes on their Super Duty. Any feedback is appreciated.

 

Yep. Those tires are popular. The 285x75x16 are a popular option too. You might check over at www.ford-diesel.com. There has been many discussions over there about this. Go with a 265x75x16 before going to a 235... Same hight but about 1" wider.