True Ames Channel Islands Tri Large Fins Thruster Fins

Performance surf fin designed to balance drive, hold, and release, helping refine how the board feels underfoot in a range of conditions.

Design & Feel

This fin is shaped to deliver controlled drive down the line while providing the ability to pivot and redirect through turns. The template is tuned to offer dependable hold when the board is on rail, yet still allows for smooth release when transitioning between maneuvers.

Wave & Board Compatibility

Suitable for a variety of boards within its fin category, this design works well in everyday surf and can be used to fine-tune how a board responds. Depending on the size and template, it can support more drawn-out lines, tighter pocket turns, or a neutral, all-around feel.

Construction

Built from durable materials to withstand repeated sessions, the fin is designed to maintain consistent flex characteristics over time. It pairs well with compatible fin systems and can be combined with other fins to create custom configurations for different conditions and preferences.