---
product_id: 184695039
title: "FCS II Reactor PC Quad Rear Fins Charcoal/Black Medium"
brand: "fcs"
price: "$192.34"
currency: USD
in_stock: true
reviews_count: 5
category: "Fcs"
url: https://www.desertcart.us/products/184695039-fcs-ii-reactor-pc-quad-rear-fins-charcoal-black-medium
store_origin: US
region: United States of America
---

# Upright template for sharper turns Smaller center fin for precise pivot Quad rear fin setup for max speed FCS II Reactor PC Quad Rear Fins Charcoal/Black Medium

**Brand:** fcs
**Price:** $192.34
**Availability:** ✅ In Stock

## Summary

> 🏄‍♂️ Ride Faster, Turn Sharper, Own Every Wave!

## Quick Answers

- **What is this?** FCS II Reactor PC Quad Rear Fins Charcoal/Black Medium by fcs
- **How much does it cost?** $192.34 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/184695039-fcs-ii-reactor-pc-quad-rear-fins-charcoal-black-medium)

## Best For

- fcs enthusiasts

## Why This Product

- Trusted fcs brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Tail Release Mastery:** Smaller center fin enhances tail release, allowing smooth slides and snap turns without losing control.
- • **Quad Fin Speed Machine:** Dual rear fins maximize acceleration and drive on beach breaks, perfect for performance shortboards.
- • **Versatile Wave Warrior:** Optimized for hollow waves and moderate-to-low rocker boards, ideal for those who demand speed and agility.
- • **Pro-Grade Collaboration:** Engineered alongside world-class surfers and shapers, trusted by the elite for top-tier performance.
- • **Cut Through Waves with Precision:** Upright fin design enables tighter, more acute directional changes for aggressive maneuvers.

## Overview

The FCS II Reactor PC Quad Rear Fins in Charcoal/Black Medium are precision-engineered surfboard fins designed for speed and tight turns. Featuring an upright template and a smaller center fin, this quad fin set enhances directional control and tail release, making it ideal for beach breaks and performance shortboards with moderate-to-low rocker. Developed in collaboration with top surfers and shapers, these fins deliver pro-level agility and acceleration for riders who want to dominate every wave.

## Description

Speed ​& tight turns. Ideal for beach breaks.

Review: Good 👍 - Good fins. At first, I was worried since it is too upright, but now, since it's a quad, it's not an issue Alon avisar
Review: Speed - These fins work great! They seemed to add speed and still had enough release on the snaps to slide the tail around.

## Features

- Upright template allows for tighter, more acute directional changes.
- OverviewDesigned for speed and tight turns, with added tail release.
- Smaller centre fin for increased pivot and tail release.
- Designed in collaboration with the world's leading surf athletes and surfboard shapers, the FCS range offers a diverse range of surfboard accesories suited to a variety of board models, wave conditions and surfing styles. FCS fins are the preferred choice by the world’s best surfers and shapers.
- - Quad Rear (2 fin) set.Ideal ConditionsSuitable for hollow waves, particularly good for beach breaks.Board TypesDesigned to fit the FCS II Fin System. - Recommended for performance shortboards with moderate-to-low rocker.Fin FamilyReactor: Find Speed. Speed, tight turns & snaps.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B084ZXRSJ2 |
| Age Range (Description) | Adult |
| Best Sellers Rank | #299,299 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #115 in Surfing Fins |
| Brand Name | FCS |
| Customer Reviews | 4.6 4.6 out of 5 stars (26) |
| Date First Available | January 24, 2020 |
| Item Dimensions LxWxH | 2.36 x 10.24 x 7 inches |
| Item Package Dimensions L x W x H | 10 x 8.5 x 1.1 inches |
| Manufacturer | FCS |
| Model Name | FREA-PC04-MD-RS-R |
| Model Year | 2020 |
| Number of Items | 1 |
| Package Weight | 0.22 Kilograms |
| Part Number | FREA-PC04-MD-RS-R |

## Product Details

- **Brand:** FCS
- **Color:** Charcoal/Black
- **Fit Type:** Regular
- **Material:** Polycarbonate (PC)
- **Sport:** Surfing

## Images

![FCS II Reactor PC Quad Rear Fins Charcoal/Black Medium - Image 1](https://m.media-amazon.com/images/I/51gnKYkBMkL.jpg)

## Questions & Answers

**Q: Is its  a set our just one?**
A: It's a set of two back fins.

**Q: how many come in the package?**
A: Hi there, thank you for reaching out! Two fins come in the package.

**Q: What is the foil?**
A: The fin foil is an aerodynamic shape from front to back of the fin. Much like the wings on an plane, this foil generates lift under the board. A fin is usually going to get thicker through the center of the fin and taper smaller out towards the edges

**Q: Can I use these rears with the front fins of my reator thruster fin set?**
A: Yes they are the rear 2 fins that will convert your tri fin set up to a quad.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good 👍
*by D***R on February 21, 2025*

Good fins. At first, I was worried since it is too upright, but now, since it's a quad, it's not an issue Alon avisar

### ⭐⭐⭐⭐⭐ Speed
*by J***R on September 12, 2021*

These fins work great! They seemed to add speed and still had enough release on the snaps to slide the tail around.

### ⭐⭐⭐⭐⭐ Love these fins!
*by D***S on September 15, 2022*

Super versatile if you get a full quad set.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-18*