---
product_id: 13091394
title: "Shimano Rear Derailleur, RD-TX800, 7/8 SPD, Direct Attach, Bla"
brand: "shimano"
price: "$1311"
currency: MXN
in_stock: true
reviews_count: 8
category: "Shimano"
url: https://www.desertcart.mx/products/13091394-shimano-rear-derailleur-rd-tx800-7-8-spd-direct-attach
store_origin: MX
region: Mexico
---

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

**Brand:** shimano
**Price:** $1311
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Shimano Rear Derailleur, RD-TX800, 7/8 SPD, Direct Attach, Bla by shimano
- **How much does it cost?** $1311 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/13091394-shimano-rear-derailleur-rd-tx800-7-8-spd-direct-attach)

## 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 mountain biking experience with the Tourney RD-TX800 Rear Derailleur - the perfect 8-speed component designed for durability, performance, and versatility. Engineered for riders seeking reliable shifting performance on rugged terrains, this long cage derailleur ensures smooth gear changes and optimal drivetrain efficiency. Materials & Construction: Constructed with , lightweight aluminum and durable steel components, the Tourney RD-TX800 offers excellent corrosion resistance and long-lasting performance. Its sleek black finish not only enhances its aesthetic appeal but also provides added protection against dirt and debris. Performance & Engineering: Designed for 8-speed mountain bike setups, the RD-TX800 features 's advanced technology that guarantees precise and responsive shifting across a wide gear range. The long cage design accommodates a maximum sprocket size of 34 teeth and a chain wrap capacity of up to 43 teeth, making it ideal for a variety of drivetrain configurations and bike styles. Components & Technology: Equipped with 's innovative Smart Cage technology, the TX800 allows for MegaRange compatibility with a shorter derailleur cage, reducing weight without sacrificing gear coverage. The derailleur mounts to the 10x1 standard, ensuring compatibility with most mountain bike frames. Its seamless integration with mountain bike shifters provides crisp, reliable shifting performance every ride. Style & Use Case: Featuring a sleek black aesthetic, the Tourney RD-TX800 seamlessly blends form and function for recreational riders, trail enthusiasts, and entry-level mountain biking. Whether you're conquering forest trails or tackling outdoor adventures, this derailleur delivers consistent performance in demanding conditions. Key Features & Benefits: - 8-speed compatibility for versatile mountain biking setups - Long cage design for larger sprockets (up to 34T) and greater gear range - Smart 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: Satisfied - Looks just like the one it replaced. Works well with the Revoshift.

## Features

- Enhanced durability with high-strength steel construction ensuring reliable performance in all terrains.
- Optimized for 8-speed drivetrains with a long cage design that provides smooth shifting across a wide gear range up to 34 teeth in the largest cog.
- Features 's Smart Cage technology for MegaRange compatibility, allowing versatile gear options while maintaining a compact derailleur profile.
- Constructed with a sleek black finish and compatibility with Mountain shifters, making it ideal for mountain biking, trekking, and hybrid bikes.
- Engineered with precise components and advanced technology to deliver responsive, seamless shifts and improved chain stability during demanding off-road rides.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00O7XMG1C |
| Best Sellers Rank | #48,679 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #7 in Rear Bike Derailleurs |
| Brand Name | SHIMANO |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,064) |
| Date First Available | November 17, 2009 |
| Included Components | Rear Derailleur |
| Item Dimensions LxWxH | 5.5 x 5.25 x 3.25 inches |
| Item Package Dimensions L x W x H | 5.59 x 5.55 x 3.11 inches |
| Manufacturer | Shimano Cycling |
| Model Name | Tourney RD-TX800 Rear Derailleur |
| Model Year | 2014 |
| Number of Items | 1 |
| Package Weight | 0.39 Kilograms |
| Part Number | ERDTX800SGSL |
| Product Dimensions | 12"L x 8"W x 2"H |
| Size | 7/8 Speed |
| Sport Type | Cycling |
| Style | Rear Derailleur |
| Suggested Users | mens |
| UPC | 689228601468 |
| Warranty Description | Limited Warranty |

## Product Details

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

## Images

![Shimano 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

### ⭐⭐⭐⭐⭐ Satisfied
*by R***N on November 13, 2025*

Looks just like the one it replaced. Works well with the Revoshift.

### ⭐⭐⭐⭐⭐ Great value
*by P***I on February 14, 2025*

Fit perfectly on my Schwinn bicycle! Super easy install -just a few tools required-easy adjustment. Shifts smoothly. Looks to be all metal unlike my oem one. Great economical solution !

## Frequently Bought Together

- Shimano Rear Derailleur, RD-TX800, 7/8 SPD, Direct Attach, Bla
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- 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.mx/products/13091394-shimano-rear-derailleur-rd-tx800-7-8-spd-direct-attach](https://www.desertcart.mx/products/13091394-shimano-rear-derailleur-rd-tx800-7-8-spd-direct-attach)

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-02-10*