Originally Posted by Lostboy
What Scott Holmer of the Race Place says is that "flat bases for race skis are necessary for top performance... but that some extremely concave skis may not be practical to grind totally flat, but should be flat on the outer 1/3 of the base." Source: Race Place 2005-06 Race Place catalog pg. 28.
At all events, there are multiple schools of thought on the subject of how flat should flat be. There are a number of threads at Epic on that very subject and no real consensus has been reached to date on the subject.
A racer or advanced skier can be expected to notice immediately if something is not right with a fresh out of the wrapper pair of skis. A less accomplished skier may blame himself rather than the skis when the skis could, in fact, be the problem. That is why I'd recommend checking them out with a true bar or taking them to a reputable shop first. Fortunately, Fischer's quality control is quite good compared to some others. However, no manufacturer is completely error free.
Now, if most skis are between 4 and 5 inches wide at the tip and tail and I said the base needs to be flat about 1" in from each edge that would be between 1/2 & 1/3 the width of the ski in those areas , would it not???? I have never seen a ski that was concave in the middle 2/3 of the ski. And once again, race skis do not need to be flat in the tip & tail any more then any other ski. Concavity in the center of the ski in the tip and tail areas with flat base Approx. 1" in from the edges has no effect on the ski charecteristics of the ski. By the way Atomic, specifically mentions this on their website. But of course that is just marketing hype. All my skis that are concave in the tip and tail as described above ski absolutely perfectly.
Edge base bevel makes a huge difference in a ski's performance characteristics.