Wrangler RT/s are adequate for rocks and stuff (as you can tell by the pix) but keep in mind that they are a STREET TIRE, not an All-terrain or Mud terrain tire. They sucked in mud, and were ok in sand.
As long as the majority of your driving is on the street, you'll be fine. They are great street tires. Im sure that the sidewall on the 16" tire is better (more plies) than the 15" as well.
Most importantly, great price..
_________________________
http://www.picturetrail.com/O1SalsaX <-----UPDATED 8/2/06

I got "IT" from ebay.
Now it burns when I pee..