Has anyone had these or seen them in action? How do they compare in different environments?

 

The H-D's will make a good eastern trail bike tire. The side lugs really bite in the ruts, just like the adds say. The lugs are more widely spaced than the XC's that I usually run out here in the desert, so thy get a better bite in the soft stuff. They do not do as well as XC's on hardpack however.

 

i just got a new set of razr 2's on my quad. awesome tire, they take a butt kicking and like it! their tough, rugged, and get awesome traction, along with kicking up some bit things, logs, boulders, small cars, landmines, steel i-beams, and polar bears.
seriously though, They also last a long time, and are just amazing. they groom my trials.