The QD2 4.0 Blackstix is a medium size quad rear with a Ride Number of 8.2. Looking to turn your favorite Thruster set into a Quad? This pair of Quad Rears can be combined with any Futures front fins to suit your riding preference, board design and waves. With an 80/20 foil, these rears are a mix of response and control. They will favor boards that have the rear boxes set closer to the rail, away from the stringer.
SPECIFICATIONS Rear Fin Area 11.67 Height 4.05 Base 3.87 Foil 80/20