The Deviant Fin – A Technical and Practical Look at How it Works

The Deviant fin has been out for a little while now, but we want to take the time to spread a little more awareness so that surfers everywhere understand how the fin works and the benefits it offers.

Designed in collaboration with RADCOR Design Studio, Firewire’s Deviant Fin serves the sole purpose of making surfing more enjoyable for beginners and experts alike. The concept behind what makes the fin work is simple: allow the “cant” of a thruster setup’s center fin to adjust naturally to the pressures it experiences while the user is surfing a wave.

Technically speaking, fin cant refers to the fin’s tilt in relation to the bottom of the board, or, in other words, the degree to which the fin leans away from the centerline of a surfboard. The Deviant Fin has been engineered with the freedom to deflect 7˚ from vertical in either direction for a total range 14˚. By giving the center fin the ability to shift and nearly match the cant of the forward fins of the thruster setup, drag is reduced and responsiveness is elevated. Surfers riding the Deviant Fin experience noticeably higher speeds throughout the duration of their turns, a tighter turning radius and quicker rail-to-rail maneuvering.

The coolest part about riding the Deviant Fin is that it can be used in both Futures and FCS fin boxes and it gives ANY board that can be ridden as a thruster a completely new feel. Designed with a tried and true template similar to the FCS M5 and Futures FEA outlines, the Deviant is highly versatile and its benefits can be applied in a wide range of wave types and sizes. Throughout our testing, we found the benefits of the Deviant Fin to be immediately noticeable, and above all, super fun.