FCS II Upright Solution Quad Rears

The Channel Islands Solution PC Quad Rear Set is designed by Britt Merrick and is based off the popular CI Upright template, built to pair seamlessly with the upright CI side fins. This rear set delivers a fast, responsive quad setup with a focus on speed, control, and tight, pivot-driven turns. Featuring a neutral-raked template and refined 80/20 foil, these fins provide a balanced feel underfoot—offering stability and hold through critical sections while still allowing for quick release and direction changes. Developed in collaboration with Channel Islands Surfboards, the Solution Quad Rears excel in punchy, hollow waves where speed and responsiveness are essential. Constructed in Performance Core material, these fins are lightweight with a progressive flex pattern, helping maintain drive through turns while offering versatility across a wide range of conditions. FEATURES & BENEFITS Based on the proven CI Upright design by Britt Merrick Neutral rake for a balance of control and pivot Designed to pair with the CI Solution Side Fins 80/20 foil for enhanced stability and directional control Lightweight construction with responsive, versatile flex Ideal for speed, tight turns, and performance quad setups PERFORMANCE FEEL The Channel Islands Solution Quad Rears feel fast, controlled, and highly responsive. The upright-inspired template allows for quick transitions and tight, pivot-style turns, while the 80/20 foil keeps the board stable and predictable through critical manoeuvres. When paired with CI Solution side fins, this rear set enhances overall drive and hold without sacrificing release. The result is a lively, high-performance quad setup that blends speed, control, and responsiveness—perfect for surfers looking to unlock performance in punchy, hollow 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 Q-Rear 4.04 105.1 4.17 108.4 11.70 7929 33.3° 80/20 LRG Q-Rear 4.14 105.1 4.27 108.4 12.29 7929 33.3° 80/20