Checking the skis when purchasing them - skiing articles
The process of personal check-up can help us reveal a number of failures that are of importance for the skiing quality of skis.
First, we should ask the seller to remove the protective film off the skis. We should hold the skis up, adhere one to another so that their edges are placed right next to each other in the area of the tail and the top of the selected skis. In the area of the central line, we shall tighten the skis so that their slip surfaces are “attached” to one another. With our free hand, we shall check if the edges in the top area of the skis are still “attached” to one another. Then, we should carefully examine if the skis are completely attached along their entire length or if there is a free space (a gap) at some spots where their close contact is lost. The allowed gap for a first-class ski is limited to 0.6 mm. If we insert six sheets of writing paper (the 80 gram one for printers) at the spot where the gap is the largest and if the paper is squeezed when the skis are tighten to one another, this will mean that the skis remain in their class.
If we put the skis in a vertical position in the same way as in the previous experiment, the point at the root of the top of the ski where the edges meet shall move downwards when thrusting skis in the midline. Ski manufacturers don’t have a unique standard for the size of this shift and it is usually in the range between 15 and 25 mm. The shift greater than 35 mm is often a symptom of material delamination in the body of the ski.
We put the skis connected this way in a horizontal position, raise them at eye level and check whether they are in contact along the entire width in the area of the top of the ski and tails, i.e. whether the edges touch at all four points. If there is no contact at one of these four points, it means that one ski deviates from the designed form and that it started to make a form of a propeller by twisting around parotid. Such a deformation affects the skis very badly when skiing. It constantly “flees” on one side, whilst the attempt of a skier to calm the ski makes it difficult for him/her to maintain direction and dynamic balance. Such skis are useless.
Both edges should be of equal width along the entire ski length, for a first-class ski. It is impossible to reveal some discrete failures by observing and checking a ski in a shop. However, some of them can be eliminated at the maintenance, at zero maintenance and during the installation of ski bindings.
Some deformities if there are any in sliding wraps and edges can be eliminated at zero maintenance. At zero maintenance, edges are usually sharpened to the S1 category skiers under the angle of 88 or rather 87 degrees. Such edges guide the skis better in turns.
Read more about the sharpening of ski edges in one of our following texts.
Checking the skis when purchasing them
Skiing articles - ski tips