The Ronix William Intelligent Wakeboard is designed with a lower, more subtle rockerline to increase speeds, reduce drag, and enlarge the sweet spot. From its low-profile thin design to sharper sidewalls to increase water flow, each aspect of the William Intelligent Wakeboard is purposefully chosen to give you the most exhilarating ride on the lake. The true secret behind the this board is its intelligent core design. By combining two of Ronix's best foam cores with Maple stringers and parabolic paulownia, Ronix has achieved a new level of responsiveness not available from other construction techniques. Pair that with interwoven carbon fiber/fiberglass and monocoque construction, and you've got the board with the most responsive, fine-tuned ride you've ever ridden. Continuous rocker. Slider/grind base. For advanced to expert riders. William Intelligent 130: 51.2"L x 16.5"W. For riders up to 160 lbs. William Intelligent 135: 53.1"L x 16.6"W. For riders up to 175 lbs. William Intelligent 140: 55.1"L x 16.8"W. For riders over 170 lbs. William Intelligent 145: 57.1"L x 16.9"W. For riders over 175 lbs.