Firstly let me say I am generally talking the basic front side bias all mountain ski category.
I understand the concept of effective contact length and the logic of why its often suggested to go longer because of it (or should I say lack of) with a ski that has early rise in the tip and sometimes both tip and tail. But what I get stuck on is the fact that most often most skiers are not skiing flat and straight anyway. Most of the time on groomers (and even off for that matter) that people ski is spent turning. Of course this means engaging the edges and is where effective contact runs basically most the entire ski length anyway.
With that said, if most the skiers time is spent turning and indeed using most all of the ski anyway than is it really necessary to go longer just because of the early rise for only the minimum amount of time the average person might actually spend going straight and fast?
To be honest if we talk tall and heavier skiers and if we go by this concept and it is to be highly regarded along with the way its often suggested in articles and suggested in ski sizing charts etc, many wouldn't even technically find skis made long enough. One would be hard pressed to even find many skis longer than something in the 180's range.
And what about skis like the rtm series from volkl? A front side bias all mountain yet "fully" rockered ski. By following the logic of this concept of less effective edge on such a ski a tall and heavier skier would probably need 200cm skis. of course that doesn't exist. This post is not about the RTM but simply only used it to make an exaggerated point since the ski is full rockered.
I am 6'1 and 240lb. if I went by the suggested concept in an all mountain piste bias ski with early rise they don't even make skis long enough for me. I am on the bliazzard xpower 810 ti @ 181 its longest model. But by these suggested standards pertaining to this concept it should be way too short for me. The early rise in my skis (the specific model) is barely there at all but none the less you get the point I am trying to make
What about an advancing beginner or also an intermediate skier who is looking to go to his/her next level? In general such skiers will go a little longer and also a little higher performance ski in order to then gain more from the ski to go along with their improving skills. But this concept about early rise would then say to go even longer than that. But this becomes a catch-22 because while turning (which again is imo what they will mostly be doing) the effective edge is more true to the ski than it is while flat. They need to maintain control and going even longer because of early rise which may help for more stable ski when flat and fast will work against the forgiveness still required while they wan to maintain controlling their way turning back and forth down the groomer.
So with all said, I sort of question the concept of "going longer because of early rise" unless ones skiing habits are to ski straight and flat most of the time but that's not imo going to be the case for most people most often anyway. None of my post here is meant to dictate anything but just questioning the thought process about any of this.
Your thoughts ?