Abstract: Telemark ski bindings may incorporate a rotational decoupler as disclosed. When exposed to subthreshold torques during normal use, the ski boot will remain rotationally coupled to (i.e, cannot rotate relative to) the ski. When exposed to threshold- or suprathreshold torques, such as when a skier loses control, the ski boot will become rotationally decoupled from (i.e., can rotate relative to) the ski, thereby protecting the skier's legs from the excessive torque and resulting leg injury. Also disclosed are tracked/railed alpine touring and telemark bindings, as well as methods for interchanging such bindings on railed/tracked skis.