Flexible binding wedges are provided with flexion slots cut in a widthwise direction to allow flexibility when mounted to a sportsboard such as a snowboard. “T” inserts through the wedges provide a mount for boot bindings. Flex adjustment bushings may be inserted into the slots to adjust the flexibility of the wedge when mounted on a sportsboard, e.g., a snowboard. The flexible wedges may be mounted under a top surface of the sportsboard, or even on top of the finished upper surface of the sportsboard.