Firewire Deviant Fin

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The Deviant fin has been out for a little while now, but it”s key 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.


Forward fin cant (how the fin tilts in relation to the bottom of the board) is normally set between 6 & 9 degrees, increasing speed through turns & drawing tighter arcs than more upright fins.


The DEVIANT FIN, developed by RADCOR Design Studio & Firewire, applies that same principle to the rear thruster fin. The DEVIANT automatically adjusts 7° of cant in either direction (14 degrees total range of movement) and noticeably increases speed & responsiveness by reducing rail-to-rail drag, & shortening the turn radius: your board will feel faster & looser. Throughout our testing we felt the benefits of the automatically canted rear fin immediately!


We designed a neutral template for the first release which is very close to a FCS M5 or a Futures FEA outline.


The DEVIANT FIN is a single rear fin suitable for a thrusters fin set up.