No, I'm not saying it's meaningless. I'm just stating how it's determined. The problem is when people say that a ski has X meter radius, and therefore, will only make X radius turns. That statement is never true. If a ski has a 20 meter radius profile, you could never even make a carved turn 20 meters in radius because you can't carve a flat ski. However, that same ski could make a 6 meter radius turn (a 12 meter diameter circle is about 36 feet?) fairly easily (I've made 1.5-2 meter radius turns on my 150s, which have an 11M radius construction). Certainly, the smaller the radius (or the larger the "sidecut"), the tighter a ski can carve an arc. However, it's all very much affected by how stiff the ski is, how heavy the skier is, how technically proficient the skier is, how fast the skier skis when carving turns, the conditions du jour, etc. What you need to do, is get out on a ski of X meter radius (or Xmm sidecut), and of X stiffness (not that there is a standard of measurement for that, but that's a seperate discussion), and determine what you like. That way, you can compare one ski's construction to others without having to try every damn ski out there, because you know, in general, what you like and don't like. Basically, it all becomes somewhat relative, and the dimentions allow you to relate to experience on other skis. Then throw in the radius or sidecut of the tail dimentions, and you have more to confuse the situation.