Guide to Surfboard Fin selection – FCS Size and rating – All Thrusters and Quads at FCS are catergorised according to their size. Each fin fits into a category according to the optimum weight range of the surfer, this range should be used as a guide when selecting a fin.
All FCS Quad and Thruster set ups also come with a rating. The rating system takes into account Drive, Pivot and Hold characteristics, which relate directly to the base length, sweep, depth, material and template.
This is a great basis for comparing fins when after a foil set for a specific purpose. But the characteristics can only be compared for fins in the same size range, so ratings are comparable between Medium fins but should not be used to compare and a medium fin with any other size.