An unprecedented amount of innovation is currently occurring with fins and fin systems. Ranging from the simple to complex, tool-less fin attachment, to a wide range of other options.

Our choice was to go back to basics, with a system that is light, strong, while at the same time simple to install and easy to use. A design optimized for under the glass installation. The goal was to deliver a system that was both simple and familiar for builders to install, and surfers to use.


GEARBOX is an innovative new fin system. It is strong, light, easy to install, dual tab compatible, and customizable.

A unique patented LOAD BEAM COLLAR offers customization options through the installed cover! System has an inexpensive routing system that simplifies and expedites the installation process.

GEARBOX is a unique new fin box design with some features not found in other fin systems.



Designed for under the glass installation, making for a watertight and clean installation. GEARBOX has a unique load beam collar that utilizes a cover optimized for improved bonding.

{{ Additionally, these covers are customizable in various ways. Boxes are light and strong with a wide range of cant options. The system is dual tab compatible allowing installation of any dual tab fin! Fin base is full length, providing a more solid base that allows the fin to be more effective.

A unique patented load beam collar with cover, turns the entire top of the cover into a bonding surface. Truss openings in the load beam collar lighten the weight without sacrificing strength. Shape of the beam improves roll strength of the system once installed. Features a wide mid-section providing largest possible footprint, without impeding close to rail installation. }}


A unique aspect of the GEARBOX fin system is the LOAD BEAM COVER. This patented cover fits into the load beam collar of the box. Where it improves bonding and enables various customization options.

{{ All covers now feature a hexagonal pattern scoring on the upper surface to improve mechanical bonding. Covers also feature a cant angle indicator in the form of a recessed number representing the box's cant angle. Located on the outboard edge of the cover. Supported angles are 0º, 2º,4º,6º, and 8º.

Covers also available in a wide range of colors as an additional customization option. }}

Routing System

Includes an inexpensive and versatile routing system. This system supports various install options for different construction techniques.

{{ The routing system enables a multi-cavity install without the need for resetting of the router bit. Designed for use with inexpensive trim routers making the system accessible to a wide range of builders.

Alternate installation options are a convenience for builders working in different materials. Primary installation method is a two-step process, creates a cavity with a shelf on which the box’s collar rests. Lower part of the cavity houses the bottom of the box.

Router jigs simplify the process of creating the cavities. Jigs allow routing without the need to adjust the depth of the router bit. }}

Install Details

The routing system is versatile enough to support different install options. These options suit different construction techniques and materials. Detailed installation guides cover every step of the process for the primary install techniques.

{{ Additionally, the customization guides show how to customize covers for different applications.

The routing system comes with printed installation guide. These guides match the ones found online. Guides provide valuable information on router bit setup. Plus general tips and tricks to achieving a successful install.

There are separate guides for normal polyurethane and EPS foam. These guides highlight the installation differences for these materials.

The install guides cover both under the glass and post lamination installation. }}


Fin systems are only as good as the talented board builders that use them. We are lucky to have some talented craftsman using the system. This showcase features their work and the innovative ways they are leveraging the system.

{{ There are also some excellent examples of customizing the covers, or leveraging color covers. Discover inspiration for your own boards in this showcase!

We will also be featuring some of the amazing boards made by our customers on our home page. These craftsman are doing some creative work, we look forward to seeing more in the future!

Anyone utilizing the system who is willing to share their creations, should feel free to send us your photos. We have a guide on our resources page that details the information we need to publish your boards. }}


HANALEI FINS manufacture an innovative and unique range of fins to compliment the system. Featured are both RTM molded, solid fiberglass, longboard center, and custom fins.

{{ We offer a range of completely unique templates that are unlike anything else available in the marketplace. Many of the fin designs feature hollow inside foils for an extra performance boost. We offer both our HRD-KORE RTM molded and custom handmade fiberglass fins.

We produce our custom handmade fins one at a time the old fashioned way, by hand foiling and finishing. These are high quality fins with exceptional foils that feature unique characteristics. The center fin range only available in fiberglass.

Our RTM molded fins deliver a range of our templates in a lightweight fin.

All of the fins in our catalog are available in either GEARBOX or DUAL TAB bases. Select templates also available with FUTURES bases, contact us for details. }}


We have two primary office locations for GEARBOX and Hanalei Fins, Australia and the USA. Contact info is provided below but the preferred contact method is through the CONTACT form on this site.


+61 417 243 592


+1 808 639 5303

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