A rotatable sports-board binding adapter mounts to a sports board and allows a user to adjust an angle of one foot relative to the sports board. The adapter includes a base plate forming a series of lock holes and at least one pocket that accommodates a low-friction puck. A rotatable plate connects to the base plate and includes a locking mechanism that can engage with any one of the lock holes to prevent rotation of the rotatable plate. When the low-friction puck is inserted into the pocket, the puck is translatable so that it contacts the rotatable plate, advantageously preventing the rotatable plate and base plate from directly contacting each other while providing a low-friction surface that enables the rotatable plate to easily rotate with respect to the base plate. As the low-friction puck wears, it may be additionally translated, or replaced with a new puck.

A front jaw (1) of a safety ski binding with a base plate (3) and a housing (2) with a housing upper part (2a) as well as with sole holders (5) pivotable about bolts (6, 6) forming vertically extending axes and having front and rear segments, the sole holders, at their front segments, receiving the bolts (6, 6) in bores (5a, 5a) and, at their rear segments, cooperating with the sole of an inserted ski boot.

The sole holders (5), at their front segments, are mounted on the housing upper part (2a) in a ball-joint-like manner, so that they are movable upwards over their rear segments by tilting the bolts (6, 6), wherein each bolt (6, 6) projects through an elongated hole (11) extending in the ski longitudinal direction, formed in the base plate (3) and having front and rear ends (11a, 11b), and below the elongated hole (11), is pressed towards the front end (11a) of the elongated hole (11) under the action of a spring (14), wherein the rear end (11b) forms a stop limiting the extent of tilting the bolts (6, 6).