The Retro Tripper was inspired by the desire for a short and wide, with plenty of glide, fish alternative for punchy and powerful skating with confidence and control. Finished with minimal logos and classic coloring, the Retro Tripper is here to deliver All ...Lost boards contain an exclusive “Progressive Rocker” concave through the length of the board. This Progressive Rocker concave is closely related to surfboard construction allowing for a reactive and performance based pump feature while skating. *Compatible with Carver 68mm Mag, 69mm Concave, and 70mm Mag wheels*