The B.O.B. Grind wakeboard features next generation construction with a shape that incorporates Liquid Force's performance paradigm. This offering includes an innovative core, construction process, and design features that make your board come alive. A thin profile CNC all wood core is the heart. Next it's wrapped in a lightweight glass layup for the ultimate in responsive flex. Then it's finished with a see-through graphic to show the beauty within the board. If you're like Bob Soven and you've been waiting for that wake charging ride, your wait is officially over! Features a thinner profile and lively flex pattern. Progressive, 5-stage rocker gives you extra straight-up kick off the wake without the braking effect of a traditional 3-stage bottom curve. LF internal Liquid Rail is an elastomeric sidewall which encloses the core of the board for increased durability and sidewall strength. Single-to-double Venturi concave hull shape lets water speed through a wide center concave into compressing dual outboard concaves that accelerate flow for extra boost. Edge channels through the center of the B.O.B. board provide extra control. B.O.B. 133: For 80-160 lb. riders. B.O.B. 137: For 120-190 lb. riders. B.O.B. 141: For 150-230 lb. riders.