5 Spark (X-Core)


X-Core Overview

Progressive flex technology. Strength where it’s needed. Flex where it’s wanted.

From years of industrial and rider testing the patented X-Core Reactor was developed combining premium grade EPS and XPS foams with unidirectional military grade carbon fiber stringers. Marrying technology and experience to create a superior flex pattern in a board that lasts longer and surfs better. Available in a range of densities to suite all surfers and conditions and suited for industry standard epoxy glassing. Ideal for cutting on AKU Shaper.

X-Core Strength

X-Core Reactor blanks are constructed from military grade uni-directional carbon fiber and premium EPS/XPS. These core materials give X-Core its superior strength to weight ratio and optimum compression stability. The X-Core’s dual carbon fiber stringers are angled to displace down force more evenly and effectively than a single wooden stringer. This provides optimum strength underfoot and throughout the length of the board without sacrificing flex.

X-Core Flex Pattern

X-Core blanks take flex to the next level by utilising the superior flex capabilities of uni-directional carbon fiber, integrated into the core in a unique cambered arch. The properties of the these unique materials work together to generate superior flex out of your back-foot pressures. This helps the fins engage and accelerate into turns, whilst also lifting the board onto the rail in the nose.


Swallow tail performance fish with Quad option fin system. Streamlined fish outline with flatter style deck and old style chunky low soft rail. Single to double concave with vee at the swallow. Lower smooth nose entry to medium tail rocker.


Developed over the last 5 years and slightly adjusted year by year to keep raising the performance factor.


Designed to be surfed as a Thruster in the 3 to 4 feet range and as a Quad from 1 to 2 feet. The team usually surf 5Spark as a Thruster and their go to smaller wave board. Surfs like a souped up high performance short board and accelerates through turns and releases the fins out of the top of the wave in a predictable manner. The Quad fin placement is old-style, meaning the fins are slightly closer to the rail than the modern Kelly Quad version. As a Quad, 5Spark exhibits extreme speed in 1 to 2 foot surf with sharp direction changes possible, but less predictable slide at the end of the turn, that’s the ‘Spark’ element.

Length Width Thickness Volume
5’6 18 5/8 2 1/16 22.75L
5’7 18 3/4 2 1/8 23.9L
5’8 19 2 3/16 25.16L
5’9 19 1/4 2 1/4 26.64L
5’10 19 1/2 2 5/16 28.26L
5’11 19 3/4 2 3/8 30.20L
6’0 20 2 7/16 32.15L
6’1 20 1/4 2 1/2 33.20L
6’2 20 1/2 2 9/16 34.96L
6’3 20 3/4 2 5/8 37.20L
6’4 21 2 11/16 38.58L
6’6 21 2 5/8 38.54L