JS Industries Carbotune Thruster Fin

The Carbotune fins use an epoxy carbon foam core with a Soric SF2 center, which is significantly lighter and more rigid than traditional polyester or solid fiberglass. This construction provides a faster spring-back effect, meaning the fins return to their neutral position quicker after a turn, resulting in more immediate responsiveness.

Yes, these are designed for powerful, high-performance surf. The high sweep and elongated template provide the extra hold and drive needed to maintain control in larger, faster waves where you need to project down the line.

Sizing is primarily based on your body weight. The small size is generally for surfers under 70kg, medium for 65kg to 80kg, and large for 75kg and above. If you are between sizes, choose the larger fin for more hold or the smaller fin for a looser, more maneuverable feel.

Because of the carbon and glass reinforcement, these fins are stiffer than standard plastic or basic fiberglass options. While this increases drive and projection, it also means they will feel more reactive and less forgiving, which is ideal for intermediate to advanced surfers looking for precision.

These are standard thruster fins designed to fit FCS II or similar dual-tab boxes. Please check your current fin box system to ensure compatibility before purchasing.