---
product_id: 184695039
title: "FCS II Reactor PC Quad Rear Fins Charcoal/Black Medium"
brand: "fcs"
price: "¥28987"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/184695039-fcs-ii-reactor-pc-quad-rear-fins-charcoal-black-medium
store_origin: JP
region: Japan
---

# Upright template for sharper turns Quad rear fins optimized for beach breaks Smaller center fin boosts pivot & tail release FCS II Reactor PC Quad Rear Fins Charcoal/Black Medium

**Brand:** fcs
**Price:** ¥28987
**Availability:** ✅ In Stock

## Summary

> 🏄‍♂️ Ride the wave of precision and speed — don’t just surf, dominate!

## Quick Answers

- **What is this?** FCS II Reactor PC Quad Rear Fins Charcoal/Black Medium by fcs
- **How much does it cost?** ¥28987 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/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

- • **Seamless Compatibility:** Fits perfectly with the FCS II Fin System, ideal for performance shortboards with moderate-to-low rocker.
- • **Precision Speed Control:** Upright fin design enables razor-sharp directional changes for unmatched agility.
- • **Pro-Grade Collaboration:** Developed alongside world-class surfers and shapers to meet elite performance standards.
- • **Enhanced Pivot & Release:** Smaller center fin maximizes tail release, empowering explosive snaps and fluid maneuvers.
- • **Tailored for Beach Breaks:** Quad rear fin setup engineered specifically to dominate hollow waves and dynamic beach conditions.

## Overview

The FCS II Reactor PC Quad Rear Fins in Charcoal/Black Medium are engineered for surfers seeking speed and tight turns, especially in beach break conditions. Featuring an upright template and a smaller center fin for enhanced pivot and tail release, these fins are crafted in collaboration with top surfers and shapers. Designed to fit the FCS II Fin System, they are the go-to choice for performance shortboards aiming to excel in hollow waves.

## Description

FCS II Reactor PC Quad Rear Fins Charcoal/Black Medium

## 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 |
|---------------|-------|
| Age Range (Description) | Adult |
| Manufacturer | FCS |
| Item Package Dimensions L x W x H | 10 x 8.5 x 1.1 inches |
| Package Weight | 0.22 Kilograms |
| Item Dimensions  LxWxH | 2.36 x 10.24 x 7 inches |
| Brand Name | FCS |
| Model Name | FREA-PC04-MD-RS-R |
| Number of Items | 1 |
| Part Number | FREA-PC04-MD-RS-R |
| Model Year | 2020 |

## Product Details

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

## 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.

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**Shop now:** [https://www.desertcart.jp/products/184695039-fcs-ii-reactor-pc-quad-rear-fins-charcoal-black-medium](https://www.desertcart.jp/products/184695039-fcs-ii-reactor-pc-quad-rear-fins-charcoal-black-medium)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-27*