---
product_id: 20172372
title: "Sram MTB Gx Type 2.1 Long Cage Rear Derailleur - Black, 10-Speed"
brand: "sram"
price: "S$109"
currency: SGD
in_stock: true
reviews_count: 13
category: "Sram"
url: https://www.desertcart.sg/products/20172372-sram-mtb-gx-type-2-1-long-cage-rear-derailleur
store_origin: SG
region: Singapore
---

# Exact Actuation tech for precise shifting Long cage design for max chain wrap Roller bearing clutch reduces chain slap Sram MTB Gx Type 2.1 Long Cage Rear Derailleur - Black, 10-Speed

**Brand:** sram
**Price:** S$109
**Availability:** ✅ In Stock

## Summary

> ⚡ Shift like a pro, ride like you own the trail.

## Quick Answers

- **What is this?** Sram MTB Gx Type 2.1 Long Cage Rear Derailleur - Black, 10-Speed by sram
- **How much does it cost?** S$109 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/20172372-sram-mtb-gx-type-2-1-long-cage-rear-derailleur)

## Best For

- sram enthusiasts

## Why This Product

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

## Key Features

- • **Built to Endure:** Durable long cage design ensures maximum chain wrap capacity for rugged 10-speed mountain and gravel rides.
- • **Lightweight & Sleek:** At just 302g with a stylish black finish, it’s the perfect blend of performance and trail-ready aesthetics.
- • **Precision Perfected:** Experience ultra-smooth, responsive gear changes with SRAM’s Exact Actuation technology.
- • **Seamless Compatibility:** Designed for easy installation with 10-speed SRAM drivetrains and standard 10x1 mounts—upgrade without hassle.
- • **Stable Ride, Every Time:** Advanced roller bearing clutch system minimizes chain slap and keeps your drivetrain rock-solid on rough terrain.

## Overview

The SRAM MTB GX Type 2.1 Long Cage Rear Derailleur is a high-performance 10-speed component engineered for mountain and gravel biking. Featuring Exact Actuation technology for precise shifting, a durable long cage for maximum chain wrap, and a roller bearing clutch to reduce chain slap, it delivers reliable, smooth gear changes on demanding terrain. Lightweight and compatible with standard SRAM 10-speed drivetrains, it’s the go-to upgrade for serious cyclists seeking durability and style.

## Description

desertcart.com : SRAM GX Type 2.1 10-Speed Long Cage Rear Derailleur Black : Sports & Outdoors

Review: Great replacement for the Sram RD-X9 - Installation was not easy sent it to bike shop, they have the tools and knowledge. I crunched my RD-X9 on a rock. This was a great replacement for my 10 speed fat bike. I would recommend. I have only ridden it about 8 times but no shifting issues. Durability, they hang down asking to be knocked off but, reasonable priced replacement for the x9. Would recommend for the average bicycler for a replacement on a 9/10 speed, mine is 10 speed.
Review: Best bang for your multi-speed bicycle buck! - IMO, this is the best derailleur you can buy in this price range. It is kind of odd that over the decades bicycles have gone from 3 speed "English" bikes to 24 speed bikes. What people are noticing is when you have 24 different speed combinations and ratios, a lot of them are so close together that they more or less get duplicated, so you really don't have 24 "useable" speed combinations. So, it makes sense to a lot of folks that a single chainring turning a 10 speed wide ratio cassette is a better and simpler system, especially since you now only have one shifter to worry about, and the cassettes come with customizable cog ratios. 10 cog cassettes are usually a little longer than 5, 6, 7 and 8 cog cassettes, so it is important to have a sturdy and dependable derailleur.

## Features

- Enhanced shifting precision with SRAM GX Rear Derailleur featuring Exact Actuation technology for ultra-smooth, responsive gear changes.
- Constructed from durable materials with a long cage design, this derailleur offers reliable performance and maximum chain wrap capacity for 10-speed mountain biking and gravel adventures.
- Advanced roller bearing clutch system provides superior drivetrain stability and reduces chain slap, ensuring consistent shifting even on the most demanding terrains.
- Designed for compatibility with 10-speed SRAM drivetrain systems and standard 10x1 mount types, making installation straightforward and versatile across various bike setups.
- Sleek black finish and lightweight construction (302g) combine style and durability, making it an ideal choice for aggressive trail riders and serious cyclists seeking high-performance components.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00V8RZ9SW |
| Best Sellers Rank | #90,029 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #28 in Rear Bike Derailleurs |
| Brand Name | SRAM |
| Customer Reviews | 4.4 4.4 out of 5 stars (713) |
| Date First Available | April 1, 2015 |
| Global Trade Identification Number | 00710845771835 |
| Included Components | Rear Deraille |
| Item Dimensions LxWxH | 6.55 x 6.8 x 3.2 inches |
| Item Package Dimensions L x W x H | 6.81 x 6.46 x 3.27 inches |
| Manufacturer | SRAM |
| Model Name | Am Rd Gx Type 2.1 10spd Long Cage Blk |
| Model Year | 2015 |
| Number of Items | 1 |
| Package Weight | 0.41 Kilograms |
| Part Number | 00.7518.080.000 |
| Product Dimensions | 12"L x 8"W x 2"H |
| Size | One Size |
| Sport Type | Cycling |
| Style | Long |
| Suggested Users | unisex |
| UPC | 757183591480 710845771835 784427964175 |
| Warranty Description | Limited Warranty |

## Product Details

- **Brand:** SRAM
- **Color:** Black
- **Item Weight:** 157 Grams
- **Material:** Aluminum
- **Mounting Type:** Standard

## Images

![Sram MTB Gx Type 2.1 Long Cage Rear Derailleur - Black, 10-Speed - Image 1](https://m.media-amazon.com/images/I/617d3tl81RL.jpg)
![Sram MTB Gx Type 2.1 Long Cage Rear Derailleur - Black, 10-Speed - Image 2](https://m.media-amazon.com/images/I/61vy5mUvkaL.jpg)

## Questions & Answers

**Q: What size should I use for a 36 -11 casette?**
A: Forgive me, but you are asking the wrong question.The cage size is controlled by the maximum amount of slack chain created by the combination of chain rings AND cassette. This is called "Chain Wrap".To formula for chain wrap is (Big Chain Ring - Small Chain Ring) + (Big cassette Cog - Small Cassette Cog).  So if you are using a compact double chain ring (50-34) and a 11-36 cassette the numbers work out to (50 minus 34) + (36 minus 11) or 16 + 25 = 41.  This means that if you shift from a big-big combination to a small-small combination, your derailleur has to be able to handle 41 teeth of loose chain, which calls for a long cage.  On my bike a have a single 40 tooth chain ring and a 11-42 cassette so the chain wrap works out to (40 - 40) + (42 - 11) = 0 + 31 = 31.   So even though I have a huge cassette I only need a medium cage because I have no front derailleur to create more chain wrap.Hope that helps.

**Q: what is short, medium.long cage?**
A: It has to do with chain wrap capacity. Small=30t Chainwrap Capacity, Medium=35t, Long=47t. The wrap is just the difference between the number of chain ring teeth plus the difference between the cog teeth. For example a 53/39 with a 12-25 cassette requires 14 + 13 = 27 teeth of wrap capacity needed from the RD.

**Q: Will this work with Shimano Ultegra shifter**
A: No, actuation will only work with sram.... The good news is that it will work with both sram 10 speed road and Mtb... Unlike the newer 11 speeds witch are road or mtb specific.

**Q: Can this be used with a shimano  11/42 cassette ?**
A: I used it with a sunrace 11-42 cassette but I needed a longer b tension screw(which was not provided) so you will likely run into the same issue.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great replacement for the Sram RD-X9
*by R***M on February 23, 2024*

Installation was not easy sent it to bike shop, they have the tools and knowledge. I crunched my RD-X9 on a rock. This was a great replacement for my 10 speed fat bike. I would recommend. I have only ridden it about 8 times but no shifting issues. Durability, they hang down asking to be knocked off but, reasonable priced replacement for the x9. Would recommend for the average bicycler for a replacement on a 9/10 speed, mine is 10 speed.

### ⭐⭐⭐⭐⭐ Best bang for your multi-speed bicycle buck!
*by F***N on April 9, 2021*

IMO, this is the best derailleur you can buy in this price range. It is kind of odd that over the decades bicycles have gone from 3 speed "English" bikes to 24 speed bikes. What people are noticing is when you have 24 different speed combinations and ratios, a lot of them are so close together that they more or less get duplicated, so you really don't have 24 "useable" speed combinations. So, it makes sense to a lot of folks that a single chainring turning a 10 speed wide ratio cassette is a better and simpler system, especially since you now only have one shifter to worry about, and the cassettes come with customizable cog ratios. 10 cog cassettes are usually a little longer than 5, 6, 7 and 8 cog cassettes, so it is important to have a sturdy and dependable derailleur.

### ⭐⭐⭐⭐⭐ Great replacement
*by J***N on June 10, 2024*

I was looking to replace the exact derailleur on my Catrike since during the process of converting it back to manual I ended up bending the cage because I didn’t realize the hanger was damaged. Worked great and now that it’s all aligned and tuned up she works great. I’m not a hardcore cyclist so this works great for my needs

## Frequently Bought Together

- Sram MTB Gx Type 2.1 Long Cage Rear Derailleur - Black, 10-Speed
- SRAM GX Trigger Shifter 10-Speed Rear Black
- SRAM PC-1051 10 Speed Chain w/PowerLock 114 Links

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-14*