Sport boot, particularly alpine ski boot

摘要

The invention relates to a ski boot adapted to be maintained in support on a ski in a manner whereby it can be freed by front and rear binding elements affixed to the ski. The boot includes a front tip, and a rear tip, the zones of retention and support extending on both sides of a vertical median plane. The front tip has a retention feature with asymmetrical mechanical characteristics with respect to the median plane so as to allow for the release of the boot as a result of a torsional bias beyond a bias threshold which is different depending upon the direction of rotation in which the torsional bias is exerted.