Many have noted the "relative" or elastic information printed by ski companies in regards to ski dimensions.
Others have questioned the relative binding placement relative to the skis. The fore /aft debate. See: http://www.realskiers.com/ski-bindings.htm
Allow me to use a concrete example in regards to one ski; the coming "hot" ski from Rossignol.
The Soul 7.
Have analyzed the data printed and even measured the ski. A 180 cm. model.
Here are the "objective" measurements coming out of my tape ( to the mm. )
177 cm. chord length
178 cm. ski surface length. That is using flexible tape and following top of ski from tip to tail.
156 cm. Contact surface on flat metal work bench.
158 cm. Contact of edge when ski placed on a 45 degree angle.
156 cm. Contact of edge when placing a ski on edge at 30 degrees.
Here is the problem for the "technical skier" who wants to get the most performance out of a ski.
If you use the old rule : measure running surface and divide by 2 to get BOF placement of bindings,,,,
If you use mid boot mark alignment on ski,,,,,
If you forget old rules and "adjust" for your ski feel,,,,,,
Did you notice I did not end phrases?
Seems there is no hard fast ONE rule for binding placement on "modern" skis.
My advice to all. Get a demo ski with a demo binding for at least a week. Ski various terrains, various conditions and vary the placement of the binding. Note these changes. Take notes all week long and and end of week YOU decide where you want that binding to be.
I asked a Rossignol technical advisor from France about this issue this summer. No firm answer. No hard fast golden rule.
We are all on new terrain. Looking for the best performance for US. Since we ski different conditions, require different ski performance variable in one week ( powder crud hard packed ) We must decide our own performance demands on a particular ski and particular ski conditions. On a "all terrain,,all type of snow ski" the decision for binding placement is ever more difficult.
Just do not go to shop,,buy skis and allow technician to blindly follow "rules". At 156 cm. running surface base contact ( on a 180 cm. ski ) 5 mm. one way or another way makes a difference.
Just a thought.
All I ask is that you all think what your performance demands are most of the time on those skis .
Edited by Voila - 7/9/13 at 6:18am