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Joom£9.00Visit shop Joom Kaisai White Tri Fin 4.37 Surfing Tri Fin Set Surfboard Fins Thruster 3 Packs
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The KaiSai Tri Fin 4.37 Thruster set is designed for intermediate to advanced surfers seeking a reliable, durable, and stable configuration for their shortboards. These fins provide excellent hold and predictability in a wide range of wave conditions due to their glass-filled nylon construction, though they may lack the high-end flex and performance characteristics found in more expensive carbon fiber or composite alternatives.
| Material | Nylon |
|---|---|
| Model Part Number | Y8991B|rbscgg |
| Brand | KaiSai |
These fins are designed for standard thruster systems; however, you should always verify that your board's box type is compatible with your specific fin base configuration.
These fins are constructed from high-quality glass-filled nylon for increased durability.
The product package includes the 3-fin set. Please check your specific packaging for included accessories.
Yes, their predictable and stable design makes them a great choice for beginners and intermediates alike.
Store them in a cool, dry place away from direct sunlight to prevent material degradation over time.
Ensure the fin is fully seated and the set screw is tightened securely using a compatible fin key.
Clean the fin box thoroughly to remove salt or sand debris, then ensure the fin base is aligned parallel to the box slot before applying gentle pressure.
To install, ensure your surfboard fin boxes are clean and free of sand or salt build-up. Insert the fin base into the box, aligning it properly, and secure it using the appropriate fin screws. Do not overtighten, as this can damage the fin box threads.
To maximize the lifespan of your KaiSai fins, rinse them thoroughly with fresh water after every session to prevent salt crystallization. Periodically check the screw tightness, especially before heading out in larger surf, to ensure they remain flush against the base. If you notice any jagged edges from reef contact, use fine-grit sandpaper to smooth them out and maintain proper hydrodynamic flow.
