Thanks guys. I copied this from
4WP's site :
An exciting new "Super Performer." A tire with traction as good as it gets in mud, snow, and rock climbing. It has a directional tread in the famous Three Stage Lug Design, scooped lugs, blade and molded siping.
Are there different types of "directional"?
BTW, that desciption is for the Super Swamper IROK, not the IROK Radial, which is the tire I'm looking at. Guess is doesn't really matter though since it's OK to limp home on a backwards tire. When I first read about directional tires, I was pretty sure they'd self-destruct if run backwards!
Thanks again.