I'm not totally sold on the kedge grip thing.

First off, read thier documents, they admit kedge will shorten the life of the tire somewhat as one of the primary functions of the kedge material (glass and walnut shells) are meant to slowly slough off creating tiny pockets in the rubber which improve grip.

I can only see this happening when street driving, and will prolly only affect traction during street driving too. So its primary effect on traction is only usefull when it degrades, and then only on street turf.

So in a M/T tire, I see kedge grip as a detriment.

In a tire used primarily on the street/highway I can see kedge as positive for traction, but decreases the life of the tire.