FCS II MR Fins

Yes, these are designed specifically for the FCS II system, allowing for tool-less installation and removal. They will fit any board equipped with standard FCS II boxes.

While these are modeled after Mark Richards' iconic twin-fin setup, they are best suited for boards shaped to accommodate a twin or twin-plus-stabilizer configuration. Using them on a standard thruster board may significantly alter the board's tracking and stability in ways that might not feel balanced.

The twin-plus-stabilizer setup prioritizes speed and a loose, skatey feel by reducing drag. The smaller center trailer fin provides just enough control to keep you from sliding out during turns, making it ideal for generating speed in softer, less powerful waves where a thruster might feel too stiff.

Performance Core materials generally offer a lighter, more responsive flex pattern that feels lively underfoot. Neo Glass provides a slightly different flex profile that can feel more forgiving, while Performance Glass is stiffer and offers a more controlled, traditional feel at higher speeds.

These fins are optimized for clean, softer conditions where you want to maximize speed and flow. In steep, hollow, or heavy surf, you may find they lack the hold and drive required for critical maneuvers, making a standard thruster or quad setup a more reliable choice.