Designed with air channels integrated into the core and an offset base structure to offer unrestricted gliding, the Sprint Crown lets your kids effortlessly ride right along side you. Sintec base. Crown Tec climbing zone. Air channel ski core are lighter and more durable than regular wood core. Offset base structure. Sidecut: 51 47 50. 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..