Designed by Britt Merrick, the FCS II CI Upright PC Quad Rear Fin Set are shaped to pair seamlessly with the upright CI side fins. Featuring a neutral-raked template, they deliver a solid balance of control and stability while still allowing for tight, pivot-style turns. The 50/50 foil enhances directional control and confidence, making this set a reliable choice for surfers looking to fine-tune their quad set
Fin Size Detail
| Size | Fin | Depth | Base | Area | Sweep | Foil |
| Medium | Quad Rear | 4.17" | 4.04" | 11.70"² | 33.3° | Flat |
| Large | Quad Rear | 4.27" | 4.14" | 12.29"² | 33.3° | Flat |
Product Info
Designed by Britt Merrick, the FCS II CI Upright PC Quad Rear Fin Set are shaped to pair seamlessly with the upright CI side fins. Featuring a neutral-raked template, they deliver a solid balance of control and stability while still allowing for tight, pivot-style turns. The 50/50 foil enhances directional control and confidence, making this set a reliable choice for surfers looking to fine-tune their quad set
Fin Size Detail
| Size | Fin | Depth | Base | Area | Sweep | Foil |
| Medium | Quad Rear | 4.17" | 4.04" | 11.70"² | 33.3° | Flat |
| Large | Quad Rear | 4.27" | 4.14" | 12.29"² | 33.3° | Flat |
Product Details
- Fin Type: FCS II
- Size: M, L
- Fins in Set: Two
- Fin Configuration: Quad
- Fin Tech: Performance Core
Product Construction
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 Construction is light and can be used in a variety of different conditions.
Additional Info
A collaboration with Channel Islands Surfboards, the CI Upright is designed for speed and 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. Neutral-raked template developed by Britt Merrick to work with upright CI side fins. Provides control and stability, while still allowing for tight pivot turns. 50/50 foil provides stability and directional control.
Ideal Conditions
Hollow steep waves, punchy beach breaks.
Board Types
Performance boards with relaxed rocker. Recommended for CI performance + hybrid models. Designed to fit the FCS II Fin System.
Fin Family
Carver: Quad
Warranty
This product is backed by a warranty from the manufacturer. Click below for details on the warranty policy for FCS II products.
Returns
If you are not 100% satisfied with your purchase you may return it for a refund, or exchange within 30 days of receiving your order.


What Our Customers Are Saying