Surfboard Fins YU - Thruster Single Tab - HEXCOREYU style surfboard fins australia Thruster for Futures Fibreglass with Hexcore inlay. YU fins are a more advanced template suited toward quick and explosive surfing. The YU has a wide base providing serious drive off the bottom, accompanied by a highly refined fin tip. The smaller centre fin provides rapid release off the top and a nice fin rake for arcing carves when put on rail. Suits performance surfing in punchy waves for those in the small to