Fin Theory
Understanding the hydrodynamics, setups, and design principles that shape every ride.
Why a fin holds, when it lets go, and what every curve of the template is doing under your feet.
Fin Terminology
The length of the fin between the leading edge and trailing edge where the fin joins the board. The base is usually the widest point of the fin outline…
7 min read Read the story
Bonzer Theory
It is amazing to think that in 1970 a couple of teenage kids came up with such an advanced surfboard design as the Bonzer. The Campbell brothers have…
Fin Patents
A paper trail of invention: twenty-five patents for surfboard fins and fin systems, from adjustable foils and breakaway holders to the Bahne box that made…
Fin Set-ups Explained
The set-up refers to how many fins and how are they placed on the board. Single fin Beginning with the inception of the first fin in 1935 through the early…
4 min read
Glass-on Fins vs Removable Fin Systems
From strictly a performance standpoint, glass-on fins have a slight advantage. It’s all about a better flex pattern. Glass-ons have no flex at the base and…