GX | Glass Flex | Quad Rear Fin Set


FCS Fins

Traditional side bite used for longboards, SUP’s or as quad rears.

Note: Original FCS fins can be used with both FCS & FCSII fin systems.


GX | Glass Flex | Glass Flex Series

High performance traditional longboard side bites (two rear fins) designed to add speed, stability and control. Suitable for use in longboards, SUP’s or as quad rears..

Ideal Conditions: A wide range of conditions from beach breaks to point breaks.

Surfboard Types: All surfboard types. All board types including mid-lengths, Longboards and SUP’s.

Glass Flex Construction:  Injection moulding process ensures geometric accuracy and provides a reliable and consistent feel. These fins are ideal for novice surfers because the relaxed (subtle) flex of these fins can be engaged with minimal effort, and as the flex returns to a neutral position the fin produces a whip-like effect that propels the board forward, and helps to maintain speed and acceleration.

Fin Specifications
Fin Specs XSmall
Base 98mm
Depth 100mm
Area mm sq. 7140mm
Sweep 33.2°
Foil Flat
Hardware Shipping

Surf Hardware | Shipping Details

  • Orders under $49 | $8 Freight
  • Orders over $49 | FREE Normal Post
  • Orders over $99 | FREE Express Post

Excludes (express post): Surfboard Covers & Surfboards

All order are shipped off the same day* Orders placed before 10am

Remote Locations (grey shaded area): Please plan for an extra 2 to 5 days, just in case.

Only the best freight carriers | Australia Post | StarTrack Freight


Returns: We make it simply and easy
Any returns simply contact us & we will send a pre-paid label to stick on the package & then drop at the post office. Simply & easy
See return details for eligibility & more info

Video | Fin Range & Construction