LFTFirewire’s product development is focused on three things: The exclusive use of epoxy resins and EPS foam cores, achieving lighter and stronger surfboards through sandwich construction, and optimizing flex to enhance performance. Though LINEAR FLEX TECHNOLOGY (LFT) may appear to be a simple construction employing familiar design philosophies found in traditionally built surfboards, nothing could be further from the truth.

LFT incorporates Firewire’s new SPRINGER HD, a 0.75” (18 mm) wide aerospace composite that runs down the centerline of the board, representing the next generation in our SPRINGER technology. Unlike the original balsa SPRINGER build which only added stiffness under the front foot, the SPRINGER HD runs the entire length of the board and plays a pivotal role in optimizing flex from nose to tail.

Inserting a high-density material down the center of the board does create engineering hurdles. For example, deck compression over the SPRINGER HD would be less than the surrounding EPS core. Over time, the deck would develop a raised area adjacent to the SPRINGER HD, akin to the ‘ridging’ effect on a PU surfboard as the surrounding foam collapses on either side of the stringer.

We addressed this issue in two ways. Firstly, the SPRINGER HD stops approximately 10mm below the top deck, ensuring that the surrounding EPS compression will not lead to ‘ridging’. Utilizing our proven sandwich construction methodology, we also added an extremely durable material to the top deck of the board. This ‘deck-skin’ now serves as an additional buffer against the ridging effect while simultaneously working in tandem with the SPRINGER HD to optimize the overall flex pattern of the LFT build. The end result is a durable surfboard with lively flex patterns that will maintain its hi-performance characteristics over time.


Learn more


TopLeftLogoXTR closed cell extruded Polystyrene foam

XTR foam is a closed cell foam extruded at high speeds using expensive machinery.

The main advantages are strength and imperviousness to water absorbtion. It is very resistant to impact and compression.

One of the most significant and most misunderstood qualities of the close cell construction is that almost no water absorption occurs in open dings (less than 1%). This means that a surfboard with a ding will not gain weight or change color resulting in longer memory (resilience) of the materials.

Also, the flex patterns of extruded foam when glassed properly can result in enormous advantage for a positive responsive surfboard. It generates more speed than any other construction.

The reason closed cell foam has not been popular with surfboard builders is the delaminations or bubbles that occurred mainly right under the front foot before ThermoVent was introduced by Epoxy Pro in 2001..

Epoxy Pro has a patent pending system called THERMOVENTING that solves the delamination problem 100%.

XTR foam can be hand shaped or CNC machine shaped for production.

XTR extruded foam has a nice presentation. The foam has high whiteness and can be airbrushed for a custom surfboard.