A lightweight, high performance quad set, the FCS Q-PC5 Surfboard Quad Fin Set features PC-5 surfboard fins in the side and GX-Q in the rear. Designed specifically for quad boards, these performance core fins are lightweight and high performance! The inside foils were developed by FCS to increase fin efficiency, speed and hold through more positive water flow. Its progressive flex pattern consists of a solid fin base combined with a slight, responsive tip flex. The new G-XQ was designed specifically for quads and has an 80/20 foil to maximize the efficiency of the fin allowing for use across a variety of toe angles in quad set ups. The PC Fins have a rounded leading edge that optimize foil performance by allowing water to flow efficiently over the foil, increasing the fins overall speed, drive and smooth rail to rail transition and are similar to Performance Glass fins only with a lightweight core.