7S Double Down – IM


The 7S Double Down aims to increase your wave count and improve your small wave game. This is the flattest surfboard in the 7S range, and it has the highest volume per size ratio. For these reasons, it’s fast, has plenty of flow, and is the perfect weapon for fatter, sub-par conditions.

FINS: NOT Supplied
STOCKISTS: Find your local dealer
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Product Description

The 7S Double Down aims to increase your wave count and improve your small wave game. This is the flattest surfboard in the 7S range, and it has the highest volume per size ratio. For these reasons, it’s fast, has plenty of flow, and is the perfect weapon for fatter, sub-par conditions.

OUTLINE: The nose and tail dimensions at 12″ are the same, creating a larger sweet spot, and a more stable planning zone. The full nose further adds to the stability, and the ‘Corner Round’ tail allows the width to extend further back, while still achieving the smooth transitions between turns that a round tail is famous for.

ROCKER: With an emphasis on everyday conditions; flat equals flow, so the Double Down will slide into waves with ease, and maintain its speed over dead sections with minimal effort. Slight lift in the nose and tail will satisfy the more experienced rider looking for a summer groveller.

CONTOURS: Subtle yet effective, the slight concave up front creates lift when taking off, then a double concave starting in the mid zone leads into a shallow rolled vee off the tail. This bottom combination maintains exceptional speed in softer waves, yet provides a nice balance of control versus quick turning response when pivoting right off the tail.

PERFORMANCE: The Double Down is fast off the mark, and super easy to turn. Think summer beach breaks or soft point waves where you need a board with enough foam and buoyancy to get you going, but don’t want to restrict how you want to perform on a wave. We suggest riding this board will bigger side fins, and a smaller centre fin.


NOTE: Fins NOT supplied with the board / Rider weight is based on board volume and intermediate rider skill level

LengthWidthThickVolumeFins Approx Weight Range
5'219 3/42 1/425.15FCS II Accelerator (not supplied)60kg / 132lb or less
5'4202 5/1627.25FCS II Accelerator (not supplied)65kg / 143lb
5'620 1/42 3/829.2FCS II Accelerator (not supplied)70kg / 154lb
5'820 1/22 1/232FCS II Accelerator (not supplied)75kg / 165lb
5'1020 3/42 5/834.8FCS II Accelerator (not supplied)80kg / 176lb
6'0212 3/437.65FCS II Accelerator (not supplied)85kg / 187lb
6'221 1/42 7/840.9FCS II Accelerator (not supplied)90kg / 198lb
6'421 1/2344.1FCS II Accelerator (not supplied)95kg / 209lb
6'621 3/43 1/1646.7FCS II Accelerator (not supplied)100kg / 220lb
6'8223 1/849.25FCS II Accelerator (not supplied)100kg / 240lb



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Technical Information

Construction Innegra Matrix

Created in collaboration with Colan Australia, Innegra Matrix (IM) is an exciting new material that’s exclusive to GSI and the 7S board range. IM consists of 3oz bi-axial fiberglass orientated at +/- 45 degrees, an Innegra cross-net woven through the fiberglass, plus 13 unidirectional carbon strands, all of which forms a single layer of fabric that’s laminated on the bottom of the board. The deck lay-up has a quad-axial configuration of fiberglass at +/- 45 degrees & standard 4oz fiberglass at 0/90 degrees. With this build, we also use a high density EPS core tha’s cut and finish shaped, and a special ultra bright epoxy resin. Overall this construction helps to control the boards torsional flex (twisting), while the carbon strands control the longitudinal flex. As a result, we still achieve that ‘pop’ and ‘lively’ feel from the EPS core, but with an underlying feeling of control and dampening that’s closer to a traditional PU board. Less chatter, more dampening = smoother through turns.
You can find out more about GSI’s surfboard construction on our surfboard construction page.

Board Contours Single to Double Rolled Vee
Rail Medium Rail
Surfer Skill Level Intermediate, Advanced
Wave Height 0-3ft Waves

4 reviews for 7S Double Down – IM

    Liam August 12, 2019

    Hey 7 surfboards I just would like to let u know I’m a 17 year old surfer from New Jersey in the US and I been surfing your double down for 2 years and I love it. It’s perfect for waves that need some more paddle power to get into cause if you didn’t know New Jersey doesn’t get the best waves in the summer so it’s perfect and I can pull of little slashes and turns in the face and even get the tail up here and there in the air. Just would like to say absolute love your boards and looking foward to more boards in the future.

    Cronulla point rider August 3, 2019

    This board ticks all the boxes. I’m 5’9” and 93kg, with a pretty good fitness level. Bought this board to ensure good paddle power and mobility. It really covers both domains. Very happy with purchase.

    William Blake January 10, 2019

    This is a really great board. Easy to ride and picks up waves easily.
    The way the board is described by GSI is completely accurate in terms of functionality when surfing it.
    Excellent in small or mushy waves and can make surfing shit conditions fun.

    Sharon Pasterfield February 25, 2018

    I’m a 54 year old felmale…brought one a few weeks ago…Very happy with the board …Picks up waves easy and goes well from small low tide shoreys to 4ft high tide filled up at the back

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