FCS II CI UPRIGHT MEDIUM QUAD REAR FIN SET (FCIM-PC04-MD-RS-R)

Designed by Britt Merrick, the FCS II CI Upright Quad Rears 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 setup.

Features

• A collaboration with Channel Islands Surfboards, the CI Upright is designed for speed and tight turns
• Neutral-raked template developed by Britt Merrick to work with upright CI side fins
• Provides control and stability while still allowing tight pivot turns
• 50/50 foil for stability and directional control
• Quad Rear (2 fins) set — Medium
• Performance Core (PC) construction, White/Flame

Performance Core

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

Ideal Conditions

• Hollow steep waves, punchy beach breaks

Board Types

• Designed to fit the FCS II Fin System
• Performance boards with relaxed rocker
• Designed for CI performance and hybrid models

Size Guide

• MEDIUM: 65kg - 80kg / 145 - 175 lbs
• Base 4.04" | Depth 4.17" | Area 11.70 sq in | Sweep 33.3° | Flat foil