These are the new rugged terrain, not the stock TRD rugged trails.I had them on a 2006 Xterra. They pretty much sucked and were replaced with BFG AT KO tires.
Short life (less than 30k on a heavy vehicle), traction was OK at best. I am far happier with my Hankook RF10 AT/M tires for a similar price.
EDIT: a buddy of mine had them come stock on his 06 or 07 Taco extra cab 4x4 V6 with the TRD package. His tire life was similar to mine.