An apparatus that secures a skateboard platform to a snow ski with a base that has a sliding member and stationary member. An adjustment mechanism urges the sliding member to move toward or away from the stationary member. A stabilizer is movable toward and way from the sliding member via a guide path in the base. The stabilizer has two components that move one inside the other to lengthen or shorten a distance between their respective ends. The sliding member has a protruding portion that fits into a front snow ski binding. The stationary member snaps into the rear snow ski binding. The front binding is sandwiched between the stabilizer and the sliding member.