Made for both beginner and expert level skiers, the EVO Action 50 features a positrack base with a softer tip and a stable platform. The EVO Action 50 are designed for on trail skiing, and the pre mounted bindings only fits NNN boots. Positrack base. Sizes: 166, 176, 186, 196. Imported. Skis and bindings are shipped unmounted and unadjusted. Skis, boots and bindings including track mounted bindings must be installed, adjusted and tested as a complete system by a qualified ski technician prior to use. Please contact our Customer Service Department at 888.463.6367 for help locating one of our stores that can perform the mounting service..