---
product_id: 10635482
title: "RK Racing Chain 520-SO-120 (520 Series) Steel 120 Link Traditional Street and Off-Road O-Ring Chain with Connecting Link, Gun Metal"
brand: "rk racing chain"
price: "1078 Lei"
currency: RON
in_stock: true
reviews_count: 8
category: "Rk Racing Chain"
url: https://www.desertcart.ro/products/10635482-rk-racing-chain-520-so-120-520-series-steel-120
store_origin: RO
region: Romania
---

# 6,900 lbs tensile strength Supports up to 400cc motorcycles Nitrite Butadiene O-ring seal RK Racing Chain 520-SO-120 (520 Series) Steel 120 Link Traditional Street and Off-Road O-Ring Chain with Connecting Link, Gun Metal

**Brand:** rk racing chain
**Price:** 1078 Lei
**Availability:** ✅ In Stock

## Summary

> 🔗 Ride Strong, Ride Smart: The Chain That Keeps You Ahead

## Quick Answers

- **What is this?** RK Racing Chain 520-SO-120 (520 Series) Steel 120 Link Traditional Street and Off-Road O-Ring Chain with Connecting Link, Gun Metal by rk racing chain
- **How much does it cost?** 1078 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/10635482-rk-racing-chain-520-so-120-520-series-steel-120)

## Best For

- rk racing chain enthusiasts

## Why This Product

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

## Key Features

- • **Ready to Ride:** Includes a clip-type master link for quick installation—get back on the road faster.
- • **Smooth Efficiency:** Nitrite Butadiene O-ring seals lock in lubrication, minimizing drag and maximizing horsepower.
- • **Lightweight Strength:** At just 3.39 lbs per 100 links, it balances toughness with agility for superior handling.
- • **Unmatched Durability:** Engineered steel chain with 6,900 lbs tensile strength for relentless performance.
- • **Versatile Powerhouse:** Optimized for both street and off-road riding up to 400cc—your all-terrain companion.

## Overview

The RK Racing Chain 520-SO-120 is a premium steel O-ring chain designed for low to mid-range motorcycles up to 400cc. Featuring a robust 6,900 lbs tensile strength and Nitrite Butadiene O-ring seals, it ensures smooth power delivery with minimal drag. Lightweight yet durable, this chain is perfect for both street and off-road use, complete with a clip-type master link for easy installation.

## Description

RK’s traditional round O-ring chain is a convenient blend of performance and affordability. SO’s O-ring is constructed from Nitrite Butadiene to seal in lubrication and deliver smooth power with minimal seal ring drag or loss of horsepower. 520SO chains are suitable for low to mid-range CC motorcycles that came from the factory with sealed chains. 520SO can be used for both on street and off-road up to 400ccs. Tensile Strength: 6,900 lbs; Max CC Rating: 400cc Street, 400cc Off-road/ATV; Max Horsepower: 60 HP; Weight per 100 Links: 3.39 lbs; Max Chain Width: 21.7mm; Master Link Included: Clip type.

Review: Sport bike chain - High quality replacement chain for most sport bikes 400cc and lower. Great application for a 250cc or 300cc sport bike. Installed into 2020 Yamaha r3.
Review: A Superior Upgrade - This RK Racing Chain is an excellent product from a top-tier brand. Unlike the original equipment manufacturer (OEM) chain on my motorcycle, which stretched and required frequent adjustments, this chain has held up perfectly. The 520-SO series uses traditional O-rings to seal in lubricant, which keeps the chain running smoothly and significantly reduces maintenance. The result is a much safer and more effective chain with very little slack or wear, even after extensive use. I am absolutely pleased with this chain and its performance. It’s a durable, long-lasting product that makes a noticeable difference and provides peace of mind on the road.

## Features

- RK’s traditional round O-ring chain is a convenient blend of performance and affordability
- SO’s O-ring is constructed from Nitrite Butadiene to seal in lubrication and deliver smooth power with minimal seal ring drag or loss of horsepower
- 520SO chains are suitable for low to mid-range CC motorcycles that came from the factory with sealed chains
- 520SO can be used for both on street and off-road up to 400ccs
- Tensile Strength: 6,900 lbs; Max CC Rating: 400cc Street, 400cc Off-road/ATV; Max Horsepower: 60 HP; Weight per 100 Links: 3.39 lbs; Max Chain Width: 21.7mm; Master Link Included: Clip type

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | RK Excel America |
| Brand | RK Racing Chain |
| Model | 520SO |
| Item Weight | 2.9 pounds |
| Product Dimensions | 10.2 x 4.8 x 1 inches |
| Item model number | 520-SO-120 |
| Is Discontinued By Manufacturer | No |
| Exterior | Steel |
| Manufacturer Part Number | 520-SO-120 |

## Images

![RK Racing Chain 520-SO-120 (520 Series) Steel 120 Link Traditional Street and Off-Road O-Ring Chain with Connecting Link, Gun Metal - Image 1](https://m.media-amazon.com/images/I/21qojqcm0uL.jpg)
![RK Racing Chain 520-SO-120 (520 Series) Steel 120 Link Traditional Street and Off-Road O-Ring Chain with Connecting Link, Gun Metal - Image 2](https://m.media-amazon.com/images/I/31oTt5w3cWL.jpg)
![RK Racing Chain 520-SO-120 (520 Series) Steel 120 Link Traditional Street and Off-Road O-Ring Chain with Connecting Link, Gun Metal - Image 3](https://m.media-amazon.com/images/I/51+iuNIkT-L.jpg)
![RK Racing Chain 520-SO-120 (520 Series) Steel 120 Link Traditional Street and Off-Road O-Ring Chain with Connecting Link, Gun Metal - Image 4](https://m.media-amazon.com/images/I/51xMuFitQ1L.jpg)
![RK Racing Chain 520-SO-120 (520 Series) Steel 120 Link Traditional Street and Off-Road O-Ring Chain with Connecting Link, Gun Metal - Image 5](https://m.media-amazon.com/images/I/61jlbVR-u1L.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Sport bike chain
*by Q***S on December 18, 2025*

High quality replacement chain for most sport bikes 400cc and lower. Great application for a 250cc or 300cc sport bike. Installed into 2020 Yamaha r3.

### ⭐⭐⭐⭐⭐ A Superior Upgrade
*by P***. on August 21, 2025*

This RK Racing Chain is an excellent product from a top-tier brand. Unlike the original equipment manufacturer (OEM) chain on my motorcycle, which stretched and required frequent adjustments, this chain has held up perfectly. The 520-SO series uses traditional O-rings to seal in lubricant, which keeps the chain running smoothly and significantly reduces maintenance. The result is a much safer and more effective chain with very little slack or wear, even after extensive use. I am absolutely pleased with this chain and its performance. It’s a durable, long-lasting product that makes a noticeable difference and provides peace of mind on the road.

### ⭐⭐⭐⭐⭐ Chain
*by D***Y on December 20, 2025*

Fine piece

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**Shop now:** [https://www.desertcart.ro/products/10635482-rk-racing-chain-520-so-120-520-series-steel-120](https://www.desertcart.ro/products/10635482-rk-racing-chain-520-so-120-520-series-steel-120)

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-01-28*