I replaced the small tips that come with the poles because I needed extra grip. I not only use the poles for trekking, as they were designed, but also as my canes, since I'm in my 80's. The rocker pads were "clunky." The small pads were okay but on the Zugspritze, in Germany, the small tips kept hanging in the holes in the ice mats tripping me up.. These would not have had the same problem. They are larger and offer grip at any angle providing extra stability regardless of the texture or roughness of the surface.
The four stars are only because the tips are slightly larger in diameter than the pole. Four wraps of tape took care of the problem. Will probably buy an extra set to take with me on trips, because they might fall off or be pulled off.