FCS Arc Thruster

These fins are designed for performance-oriented boards that feature deep concaves and significant rocker. They are best suited for boards built to handle high-speed, aggressive surfing rather than grovelers or flat-rocker cruisers.

The smaller center fin is specifically engineered to reduce drag and facilitate quicker, more responsive releases during turns. It allows you to break the tail loose more easily when you need to perform tight, critical maneuvers.

Yes, these are designed for the FCS II system, which allows for tool-less installation and removal. They are fully compatible with any board equipped with FCS II boxes.

They excel in hollow, punchy conditions where you need reliable hold and speed. If you are surfing soft, mushy waves, you might find the progressive flex pattern and raked profile less effective than a more upright, pivot-oriented fin.

A progressive flex pattern means the fin is stiffer at the base for drive and speed, but becomes more flexible toward the tip. This provides a predictable, spring-like response that helps you maintain hold through high-speed turns without the fin feeling too rigid or too loose.