I don't know what you're talking about; alpha 1s have the shortest turning radius of almost any (adult) ski on the market. Their longest length, a 182, has around a 15m turning radius, and their shortest length (170) is around 12m! This is because the dimensions are similar to those of a regular ski, but the early taper brings the forward and rearward contact points much closer to the center of the ski - the tip and tail dimensions aren't made smaller in proportion to the amount they're moved toward the center, so they're proportionally larger compared to the skis' center than most skis, making them want to carve super tight turns. Also, a skis' rocker profile has nothing to do with it's turning radius; the radius is determined by the sidecut profile combined with the skis' length. To the OP, alphas are known to be some of the lightest skis on the market. Not only is their actual weight extremely light, but they have a super low swing weight because 1) more of the skis' weight is concentrated towards the center of the ski than a traditional ski, so the tips and tails feel proportionally lighter in relation to the total weight of the ski than your average park ski. 2) the ar50 construction uses a cap in the tips and tails, further reducing weight.