---
product_id: 625058465
title: "RD-TY21B 6/7 Speed Derailleur - Direct/Hanger Mount for Mountain, Tricycle, Commuter, Cruiser Bikes"
brand: "relwears"
price: "€ 37.30"
currency: EUR
in_stock: true
reviews_count: 9
category: "Relwears"
url: https://www.desertcart.nl/products/625058465-rd-ty21b-6-7-speed-derailleur-direct-hanger-mount-mountain
store_origin: NL
region: Netherlands
---

# Durable aluminum alloy build 6/7 speed compatibility Direct mount for stable shifting RD-TY21B 6/7 Speed Derailleur - Direct/Hanger Mount for Mountain, Tricycle, Commuter, Cruiser Bikes

**Brand:** relwears
**Price:** € 37.30
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift into the future of effortless rides!

## Quick Answers

- **What is this?** RD-TY21B 6/7 Speed Derailleur - Direct/Hanger Mount for Mountain, Tricycle, Commuter, Cruiser Bikes by relwears
- **How much does it cost?** € 37.30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/625058465-rd-ty21b-6-7-speed-derailleur-direct-hanger-mount-mountain)

## Best For

- relwears enthusiasts

## Why This Product

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

## Key Features

- • **Direct Mount Design:** Ensures secure installation and precise shifting without hanger hassles
- • **Versatile Compatibility:** Perfect fit for mountain, commuter, cruiser, folding, and tricycle bikes
- • **Seamless 6/7 Speed Shifting:** Optimized for smooth gear transitions across multiple bike types
- • **Effortless Setup & Adjustment:** User-friendly design means less time tuning, more time riding
- • **Rugged Aluminum Alloy Construction:** Engineered for durability and long-lasting performance on every ride

## Overview

The RD-TY21B is a high-performance 6/7 speed rear derailleur crafted from durable aluminum alloy, designed for direct mount installation. Compatible with a wide range of bikes including mountain, commuter, cruiser, folding, and tricycles, it delivers smooth, reliable shifting and easy setup, making it the go-to upgrade for riders seeking stability and versatility.

## Description

desertcart.com : RD-TY21B 6/7 Speed Direct Mount Derailleur for Mountain Tricycle Commuter Cruiser Bike : Sports & Outdoors

Review: Works great - Works great. Didn't even have to adjust
Review: Great price and quality - Needed a quick replacement for a customer. Nice quality and good fit and easy adjustment. Only been on for a month, so I cant speak of durability as of yet.

## Features

- MODEL: RD-TY21B; Bike rear derailleur is compatible with 6/7 speed most kinds of bikes.
- PERFORMANCE: Durable aluminum alloy material and excellent shifting performance ensure safe and stable riding.
- WIDE APPLICATION: This bicycle transmission is Suitable for MTB, mountain bikes, commuter bike, cruiser bike, folding bike etc.
- NOTE: The bike rear derailleur is direct mount, not hanger mount .Please check the mount type of the original part before purchasing. If you have any questions, please feel free to contact us, we will provide you with professional services.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CWNNL8WH |
| Best Sellers Rank | #22,453 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #3 in Rear Bike Derailleurs |
| Brand Name | Relwears |
| Customer Reviews | 4.4 4.4 out of 5 stars (149) |
| Date First Available | February 28, 2024 |
| Included Components | NO |
| Item Package Dimensions L x W x H | 4.8 x 4.72 x 2.44 inches |
| Manufacturer | Relwears |
| Model Name | TY21B Rear Derailleur |
| Package Weight | 0.32 Kilograms |
| Part Number | RD-TY21B 6/7 Speed |
| Size | 6/7 Speed |
| Warranty Description | 1 |

## Product Details

- **Brand:** Relwears
- **Color:** Black-RD-TY21B-Direct Mount
- **Item Weight:** 0.33 Kilograms
- **Material:** Aluminum
- **Mounting Type:** Direct Mount

## Images

![RD-TY21B 6/7 Speed Derailleur - Direct/Hanger Mount for Mountain, Tricycle, Commuter, Cruiser Bikes - Image 1](https://m.media-amazon.com/images/I/614ucfMELYL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great
*by B***T on January 4, 2026*

Works great. Didn't even have to adjust

### ⭐⭐⭐⭐⭐ Great price and quality
*by A***R on October 12, 2025*

Needed a quick replacement for a customer. Nice quality and good fit and easy adjustment. Only been on for a month, so I cant speak of durability as of yet.

### ⭐⭐⭐⭐ It works well.
*by T***S on February 28, 2025*

It's easy to install.

## Frequently Bought Together

- RD-TY21B 6/7 Speed Derailleur - Direct/Hanger Mount for Mountain, Tricycle, Commuter, Cruiser Bikes
- Bike Chain Kit, Single/6/7/8/9/10/11/12 Speed Multi-Function Bike Mechanic Repair Kit, Chain Breaker and Bike Link Plier with Hook and 6 Pairs Bicycle Buckle, Reusable (6/7/8 Speed Bike Chain Kit)
- FGBNM Single/6/7/8/9/10/11/12 Speed Bike Chain, Bike Chain for Road Mountain Racing Cycling

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**Shop now:** [https://www.desertcart.nl/products/625058465-rd-ty21b-6-7-speed-derailleur-direct-hanger-mount-mountain](https://www.desertcart.nl/products/625058465-rd-ty21b-6-7-speed-derailleur-direct-hanger-mount-mountain)

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-26*