NEW SEASON COLOUR

Our best-selling CI Upright template is now available in a tri-quad set

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Performance
Material
Size
Shipping

Overview

The FCS II CI Upright Tri-Quad Fin Set is designed with Channel Islands for surfers who want speed, control, and quick direction changes. Its upright template allows for snappier turns and faster transitions, making it ideal for tight pocket surfing. As a Tri-Quad (5 fin) setup, it offers versatility. Use the thruster for precision and the quad for added speed and hold.

The Performance Core (PC) construction ensures a lively, responsive feel underfoot. Compared to the FCS II Al Merrick Tri-Quad Fin Set, which has a more raked template for drawn-out carves and added stability, the CI Upright is better suited for quick, reactive surfing and fast transitions.

When paired with the Channel Islands Better Every Day board, this setup excels across a range of conditions, providing a dynamic mix of manoeuvrability and speed. Perfect for surfers looking to push their performance. Overall, the CI Upright Tri-Quad set is suited to boards with the more relaxed rocker.

"We designed the CI Upright because our surfboard range extended well into the hybrid and step-down categories and we needed a fin to maintain response and turning performance on our boards where the rocker was a little more relaxed and flatter".

"This fin allows you to gain start-up drive and acceleration really quickly, yet still feel loose and free off the top. Many of our team riders have also gravitated to this fin on their high-performance shortboards and step-ups where they wanted less resistance and the ability to stay right in the pocket". - Britt Merrick
- A collaboration with Channel Islands Surfboards, the CI Upright is designed for speed & tight turns
- A template that comes to life in punchy hollow waves, but also suit conditions where you need that start-up speed to get going.
Ideal Conditions
- Hollow steep waves, punchy beach breaks
Board Types
- Designed to fit the FCS II Fin System.
- Performance boards with relaxed rocker
- Deisgned for CI performance + hybrid models
Fin Family
- Thruster: Reactor: Find speed. Speed, tight turns & snaps
- Quad: Carver
Performance Core

Performance Core (PC) fins are made using a multi-layered resin transfer molding process. The flex pattern in PC fins extends progressively from the base through to the tip, helping the surfer to maintain drive and hold through a turn. This versatile fin material is light, and can be used in a variety of different conditions.

MEDIUM (65Kg - 80Kg / 145 - 175 Lbs)
LARGE (75Kg - 90Kg / 165 - 200 Lbs)

Fin	Base (inches)	Base (mm)	Depth (inches)	Depth (mm)	Area (inches)	Area (mm)	Sweep Deg°	Foil
MED Side	4.39	111.4	4.59	116.4	15.04	9700	30.3°	Flat
MED Ctr	4.39	111.4	4.59	116.4	15.04	9700	30.3°	50/50
MED Q-Rear	4.04	105.1	4.17	108.4	11.70	7929	33.3°	Flat
LRG Side	4.50	114.2	4.70	119.3	15.79	10190	30.3°	Flat
LRG Ctr	4.50	114.2	4.70	119.3	15.79	10190	30.3°	50/50
LRG Q-Rear	4.14	105.1	4.27	108.4	12.29	7929	33.3°	Flat

View the FCS Fin Data page for Base/Depth/Area/Foil information.

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- Returns: 30-day exchange or refund for unopened items.

Channel Islands Collection