Upright template allows for tighter, more acute directional changes. OverviewDesigned for speed and tight turns, with added tail release. Smaller centre fin for increased pivot and tail release. Designed in collaboration with the world's leading surf athletes and surfboard shapers, the FCS range offers a diverse range of surfboard accesories suited to a variety of board models, wave conditions and surfing styles. FCS fins are the preferred choice by the world’s best surfers and shapers. - Quad Rear (2 fin) set.Ideal ConditionsSuitable for hollow waves, particularly good for beach breaks.Board TypesDesigned to fit the FCS II Fin System. - Recommended for performance shortboards with moderate-to-low rocker.Fin FamilyReactor: Find Speed. Speed, tight turns & snaps. Speed ​& tight turns. Ideal for beach breaks.