Simple Innovation!

Take your surfing to the next level with the GEARBOX Fin System!



Delivering a system that is simple, familiar, and easy to use.

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

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

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


Designed to be light without sacrificing strength, every part has been designed for a specific function.


Designed to be placed underneath layers of glass for strength, integrity, and stability.


Patented load beam and cover system enhances bond to lamination.


Patented cover of the system can be customized in numerous ways.


Slot is designed to allow the fin to be moved forward and backwards.


Slot is designed to accomodate any DUAL TAB base fin, adding adjustablity.

About The SYSTEM


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 solid base that makes for a more effective fin.

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 save weight without sacrificing strength. Shape of the beam improves roll strength of the installed system. Features a wide mid-section for the largest possible footprint, without impeding close to rail installation.

About The SYSTEM


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.

A wide range of customization options that can be applied to the covers to enhance the appearance of the box once installed. These include wood inlays and overlays, colorization of the hex grooves, and our favorite abalone inlays.

About The 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. Base jig can be customized for certain installations.

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.

They 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.

They produce their 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.

Their RTM molded fins deliver some of their range of templates, in a lightweight fin.

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

Clicking on the logo below will take you to the HANALEI FINS website.

To find out more, or to get questions answered.