---
product_id: 13091394
title: "Rear Derailleur, RD-TX800, 7/8 SPD, Direct Attach, Bla"
brand: "shimano"
price: "190.21 DT"
currency: TND
in_stock: true
reviews_count: 8
category: "Shimano"
url: https://www.desertcart.tn/products/13091394-rear-derailleur-rd-tx800-7-8-spd-direct-attach-bla
store_origin: TN
region: Tunisia
---

# Smart Cage MegaRange tech 8-speed optimized drivetrain high-strength steel durability Rear Derailleur, RD-TX800, 7/8 SPD, Direct Attach, Bla

**Brand:** shimano
**Price:** 190.21 DT
**Availability:** ✅ In Stock

## Summary

> ⚡ Shift smarter, ride stronger — unlock your trail’s full potential!

## Quick Answers

- **What is this?** Rear Derailleur, RD-TX800, 7/8 SPD, Direct Attach, Bla by shimano
- **How much does it cost?** 190.21 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/13091394-rear-derailleur-rd-tx800-7-8-spd-direct-attach-bla)

## Best For

- shimano enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** High-strength steel construction engineered for rugged durability and daily dependability.
- • **Sleek Black Finish:** Modern aesthetic meets dirt-resistant protection for a clean, professional look on every ride.
- • **Effortless Integration:** Direct attach design pairs perfectly with mountain shifters for crisp, responsive control.
- • **MegaRange Compatibility:** Smart Cage technology delivers wide gear range without bulk—ride versatile, ride smart.
- • **Precision 8-Speed Shifting:** Seamlessly conquer varied terrains with smooth, reliable gear changes.

## Overview

The Shimano Tourney RD-TX800 Rear Derailleur is a robust, 8-speed compatible component designed for mountain and hybrid bikes. Featuring a long cage for up to 34-tooth sprockets and Smart Cage technology for MegaRange compatibility, it ensures smooth, precise shifting across a wide gear range. Constructed with durable steel and finished in sleek black, it offers reliable performance and corrosion resistance ideal for rugged terrains and daily use. Perfect for riders seeking dependable, budget-friendly drivetrain upgrades with professional-grade responsiveness.

## Description

Upgrade your bike's shifting performance with the Tourney RD-TX800 Rear Derailleur - the perfect solution for 8-speed mountain biking and hybrid cycles. Designed with precision engineering and innovative technology, this robust derailleur ensures smooth, reliable gear changes every ride. Materials & Build Quality Constructed from high-strength, lightweight materials, the Tourney RD-TX800 offers durability and corrosion resistance, making it ideal for demanding terrains and all-weather conditions. Its sleek black finish not only provides a stylish look but also enhances longevity. Performance & Engineering Engineered with 's advanced Gear Indexing technology, the RD-TX800 delivers crisp, precise gear shifts. The long cage design accommodates larger cogs for a wide gear range, supporting a 34-tooth largest cog and a chain wrap capacity of 43 teeth-perfect for tackling steep climbs and fast descents alike. Components & Technology Equipped with 's Smart Cage technology, the TX800 features a design optimized for MegaRange compatibility with a shorter derailleur cage, reducing weight without sacrificing performance. Compatibility with Mountain rear shifters and a 10x1 standard mount ensures seamless integration with your existing drivetrain setup. Style & Use Case Whether you're upgrading your mountain bike, commuter, or hybrid cycle, the Tourney RD-TX800 provides a versatile, reliable shifting solution. Its black finish complements any bike aesthetic, from rugged trail bikes to urban commuters. Innovative & Differentiating Features Highlighting 's commitment to enhancing rider experience, the RD-TX800's Smart Cage technology minimizes derailleur length while maintaining wide gear ranges, offering a lighter, more efficient setup. This derailleur's engineering focus on durability and smooth operation makes it a standout choice for entry-level to mid-range bicycles seeking dependable performance. Optimized for Search & C

Review: Reliable Budget Shimano Rear Derailleur For 7 And 8 Speed Bikes - TL;DR: Solid entry level Shimano rear derailleur that shifts reliably for 7 and 8 speed setups when installed and adjusted correctly. I picked up this Shimano Tourney TX RD TX800 as a replacement derailleur for a basic city and light trail bike. For this purpose it has performed as advertised. Once installed and dialed in, the shifting across the cassette is predictable, with gears engaging cleanly as long as the cable tension and limit screws are set properly. I paired it with a matching Shimano shifter and a standard 7 speed freewheel, and the components work together without drama. This is an entry level unit, so the materials lean more toward stamped steel and basic finishes rather than the lighter alloys you see on higher groups, but that is reflected in the price. For commuter and recreational riding, the extra weight is not very noticeable and the derailleur feels robust enough to handle daily use. The medium cage length provides enough capacity for a reasonably wide range cassette, which is helpful if the bike is used in varied terrain. Installation is straightforward if you have some familiarity with derailleur setup or are willing to follow a guide. The B tension, high, and low limit adjustments respond as expected, and the cable pinch bolt is easy to access. In my experience, once everything is set, the derailleur holds its adjustment well and only needs occasional minor tweaks as the cable stretches. This is only an opinion, not objective truth, since results will depend heavily on the condition of the rest of the drivetrain and the quality of the installation. Overall, for an affordable replacement or upgrade on a basic 7 or 8 speed bike, this derailleur is a practical choice that does what it claims to do. Thank you for reading my review here, I try to be helpful. Notify/write to me here on desertcart if you have any additional questions for me
Review: Quality Brand - Fit and worked perfectly as replacement for my wife’s bike.

## Features

- Enhance your bike's performance with the Tourney RD-TX800 Rear Derailleur, engineered for reliable 8-speed shifting on mountain and hybrid bikes.
- Designed with a long cage and MegaRange compatibility, this derailleur accommodates up to 34-tooth cogs for versatile gearing options across diverse terrains.
- Constructed with durable materials and precise engineering, the TX800 ensures smooth, responsive shifts and longevity in demanding riding conditions.
- Featuring 's Smart Cage technology, the TX800 delivers optimized chain tension and compatibility with a wide range of components for seamless upgrades.
- Ideal for entry-level and budget-conscious cyclists seeking dependable shifting performance, this rear derailleur pairs stylish black finish with easy installation on 10x1 standard mounts.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00O7XMG1C |
| Best Sellers Rank | #29,384 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #6 in Rear Bike Derailleurs |
| Brand | SHIMANO |
| Brand Name | SHIMANO |
| Case Material Type | Aluminum Alloy |
| Color | Black |
| Customer Reviews | 4.5 out of 5 stars 1,075 Reviews |
| Included Components | Rear Derailleur |
| Item Dimensions L x W x H | 12"L x 8"W x 2"H |
| Item Type Name | Rear Derailleur |
| Item Weight | 13.6 ounces |
| Manufacturer | Shimano Cycling |
| Manufacturer Part Number | ERDTX800SGSL |
| Material | Multi |
| Material Type | Multi |
| Model Number | ERDTX800SGSL |
| Mount Type | Braze-On Mount |
| Mounting Type | Braze-On Mount |
| Number of Teeth | 34 |
| Product Dimensions | 12"L x 8"W x 2"H |
| UPC | 689228601468 |
| Unit Count | 1.0 Count |
| Warranty Description | Limited Warranty |

## Product Details

- **Brand:** SHIMANO
- **Color:** Black
- **Item Weight:** 13.6 ounces
- **Material:** Multi
- **Mounting Type:** Braze-On Mount

## Images

![Rear Derailleur, RD-TX800, 7/8 SPD, Direct Attach, Bla - Image 1](https://m.media-amazon.com/images/I/610Fxf7AXDL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Reliable Budget Shimano Rear Derailleur For 7 And 8 Speed Bikes
*by S***M on November 16, 2025*

TL;DR: Solid entry level Shimano rear derailleur that shifts reliably for 7 and 8 speed setups when installed and adjusted correctly. I picked up this Shimano Tourney TX RD TX800 as a replacement derailleur for a basic city and light trail bike. For this purpose it has performed as advertised. Once installed and dialed in, the shifting across the cassette is predictable, with gears engaging cleanly as long as the cable tension and limit screws are set properly. I paired it with a matching Shimano shifter and a standard 7 speed freewheel, and the components work together without drama. This is an entry level unit, so the materials lean more toward stamped steel and basic finishes rather than the lighter alloys you see on higher groups, but that is reflected in the price. For commuter and recreational riding, the extra weight is not very noticeable and the derailleur feels robust enough to handle daily use. The medium cage length provides enough capacity for a reasonably wide range cassette, which is helpful if the bike is used in varied terrain. Installation is straightforward if you have some familiarity with derailleur setup or are willing to follow a guide. The B tension, high, and low limit adjustments respond as expected, and the cable pinch bolt is easy to access. In my experience, once everything is set, the derailleur holds its adjustment well and only needs occasional minor tweaks as the cable stretches. This is only an opinion, not objective truth, since results will depend heavily on the condition of the rest of the drivetrain and the quality of the installation. Overall, for an affordable replacement or upgrade on a basic 7 or 8 speed bike, this derailleur is a practical choice that does what it claims to do. Thank you for reading my review here, I try to be helpful. Notify/write to me here on Amazon if you have any additional questions for me

### ⭐⭐⭐⭐⭐ Quality Brand
*by B***F on September 21, 2025*

Fit and worked perfectly as replacement for my wife’s bike.

### ⭐⭐⭐⭐ Install instructions not included
*by V***N on March 25, 2023*

This inexpensive Derailleur works great with a new inexpensive gear set and a new inexpensive chain. However, instructions were not included in the box nor are the instructions on their webpage. I had to go on youtube on how to install and adjust. Other than this issue, I am glad to buy all three new components to make my hybrid ride like new. ebike is next in about 3 years so I wanted to go cheap.

## Frequently Bought Together

- Shimano Rear Derailleur, RD-TX800, 7/8 SPD, Direct Attach, Bla
- AUTUT 2 Pcs Universal Bicycle Bike Derailleur Hanger Frame Gear Tail Hook, Silver Tone
- 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)

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**Shop now:** [https://www.desertcart.tn/products/13091394-rear-derailleur-rd-tx800-7-8-spd-direct-attach-bla](https://www.desertcart.tn/products/13091394-rear-derailleur-rd-tx800-7-8-spd-direct-attach-bla)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-05-21*