Quote Originally Posted by Doc in AZ View Post
IMHO a fully inflated tire is more prone to being punctured as it is not going to flex.
I fully agree on Doc's statement. I have experienced that myself a couple of years ago. We were riding a trail in Big Bend National Park (TX) which was covered with little very sharp rocks. Since I didn't air down I punctured two tires. I ended up plugging the tire with the smallest puncture with the biggest screw I could get off my Grand Cherokee (one in the rear hatch). It worked and got us of the trail to the repair shop within the park. I have to say, it was good learning experience for me. I was just starting offroading and ofcourse had no repair plugs with me and not much experience airing down tires.

For me airing down is essential for traction and preventing puncturing the tires.