The rear derailleur is a critical component that dictates how smoothly and efficiently your bike shifts gears. Selecting the right one can significantly impact your riding experience, whether you're tackling steep climbs or enjoying fast descents. Understanding the key features and compatibility will ensure you get the most out of your cycling adventures.
Looking for the best Rear Bike Derailleurs?
Discover now our comparison of the best Rear Bike Derailleurs. It is never easy to choose from the wide range of offers. On the market, you will find an incalculable number of models, all at different prices. And as you will discover, the best Rear Bike Derailleurs are not always the ones at the highest prices! Many criteria are used, and they make the richness and relevance of this comparison.
To help you make the best choice among the hundreds of products available, we have decided to offer you a comparison of the Rear Bike Derailleurs in order to find the best quality/price ratio. In this ranking, you will find products listed according to their price, but also their characteristics and the opinions of other customers. Also discover our comparisons by categories. You won’t have to choose your products at random anymore.
- Model: RD-TZ31A Direct Mount Rear Derailleur, suitable for GS 6/7 speed SIS index shifting drivetrain.
- Premium Materials: The rear derailleur utilizes durable aluminum alloy and plastic alloy material, combined with exceptional shifting performance, ensuring safe and stable riding.
- Widely Used: Bike 6/7 speed derailleur suitable for most kinds of bikes like mountain bike, road bike, folding bicycle etc.
- Easy Installation: Mountain bike derailleur features a standard direct mount design ensure easy installation and adjustment, making it accessible for both beginner and experienced cyclist to set up.
- Important: To avoid delays or issues, please confirm whether it is a direct mount or hanger mount bicycle derailleur before purchasing.
- 【Model】RD-TY300-SGS; Bike 6/7 Speed Rear Derailleur for most kinds of bikes like mountain bike, hybrid bike, kids bike, cruiser bike etc.
- 【Features】Smooth shifting, 6/7 speed derailleur is easy and fast to install. Bracket fit (under wheel nut) Long cage tourney derailleur, total capacity 43T, pulley/Teeth 13/13T. Low sprocket: Max. 34T; Low sprocket: Min. 28T; Top sprocket: Max. 14T...
- 【Type】Long cage tourney derailleur, RD-TY300-SGS 6/7 speed derailleur is compatible with 11T /14T high speed gear.
- 【 Stability】Made of high quality durable aluminum alloy material and come with excellent shifting performance ensure your safe and stable while riding.
- 【Application】RD-TY300-SGS is compatible with 6 and 7-speed SIS INDEX variable speed transmission systems. Suitable for MTB, mountain bikes, road bikes, folding bicycles, commuter bikes, tricycles, eletric bikes etc.
- Model: RD-TZ31A Hanger Mount Rear Derailleur, suitable for GS 6/7 speed SIS index shifting drivetrain.
- Premium Materials: The rear derailleur utilizes durable aluminum alloy and plastic alloy material, combined with exceptional shifting performance, ensuring safe and stable riding.
- Widely Used: Bike 6/7 speed derailleur suitable for most kinds of bikes like mountain bike, road bike, folding bicycle etc.
- Easy Installation: Mountain bike derailleur features a standard hanger mount design ensure easy installation and adjustment, making it accessible for both beginner and experienced cyclist to set up.
- Important: To avoid delays or issues, please confirm whether it is a direct mount or hanger mount bicycle derailleur before purchasing.
- [IMPORTANT] It's Direct Mount Rear Derailleur for Mountain Bike, not Hanger mount
- MODEL: RD-TZ31A Hanger Mount Rear Derailleur,Suitable for 6/7speed.
- STABILITY: Durable aluminum alloy material and excellent shifting performance ensure safe and stable ridin
- PRECISE ADJUSTMENT: High-hardness aluminum alloy body adjustment, adjustment is more precise. It can be adjusted slightly in multiple places to ensure accurate speed change performance.
- MUE GUIDE WHEEL: PA nylon wear-resistant aluminum alloy guide wheel, silent, smooth and no abrading for chain.
- INSTALLATION:Fast and convenient installation and easy maintenance.(Note:The bike rear derailleur is Hanger Mount,not Direct Mount.Please check the mount type of the original part before ordering.)
- SCOPE OF APPLICATION:Suitable for mountain bikes, station wagons, folding bikes, etc.If you have any questions,please feel free to contact us.
- Material: aluminum
- Pull Type: mechanical
- Cage Length: long
- Cassette Range: 10 - 51t
- Gearing: 1 x 12
- MODEL: TY300 Direct Mount Bicycle rear derailleur, Suitable for 6/7speed.
- MATERIAL: This bicycle rear derailleur is made of high-quality steel, durable and long service life.Easy to install and disassemble.
- PERFORMANCE: Durable aluminum alloy material and excellent shifting performance ensure safe and stable riding.
- WIDE APPLICATION: This bicycle transmission is suitable for variable speed bikes, mountain bikes, road bikes, bicycle racing, city bikes, folding bikes, etc.It is your indispensable bicycle accessories during your cycling journey.
- 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.
- 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.
- MODEL: RD-TY21B hanger Mount derailleur; Guide wheel teeth: 11T; Tooth capacity: 34T, Bike rear derailleur is compatible with 6/7 speed most kinds of bikes.
- PERFORMANCE: The TY21B 7 speed derailleur is constructed from durable aluminum alloy material and excellent shifting performance ensure safe and stable riding.
- SIMPLE TO INSTALL AND MAINTAIN:The process consists of four main steps: installation, adjusting the limit stops, tightening the cable and adjusting the tension
- WIDE APPLICATION: This bicycle derailleur is suitable for MTB, mountain bikes, commuter bike, cruiser bike, folding bike etc.
- NOTE: The bike rear derailleur is hanger Mount , not direct mount.Please check the mount type of the original part before purchasing.
- MODEL: Bicycle rear derailleur RD-TY300, compatible with 6 and 7-speed SIS INDEX variable speed transmission systems.
- Advanced Gear Range: 43T Total Capacity - Handles extreme gear ranges, with a max/min tooth difference of 20T, 14-34T cassette compatibility ideal for steep climbs and high-speed flats.
- Multi-Speed Compatibility: Works seamlessly with 6/7-speed drivetrains and 8/7/6-speed chains. Perfect for mountain, road, and hybrid bikes.
- Ultra-Durable Build: High-Quality Aluminum Alloy - Lightweight yet tough, built to withstand mud, water, and heavy-duty riding. Pulleys for silent, long-lasting performance in all conditions.
- Wide Application: Fits standard 6/7-speed direct mount, making it ideal for MTBs, gravel, and touring bikes.
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Last update on 2026-04-27 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Rear Bike Derailleurs
Understanding Derailleur Types
Rear derailleurs primarily come in two main types: short cage and long cage. Short cage derailleurs are generally lighter and designed for bikes with a smaller range of gears, often found on road bikes. Long cage derailleurs offer greater chain wrap capacity, making them suitable for mountain bikes or bikes with a wider gear range and larger cassettes.
Compatibility is Key
- Shifter Compatibility: Ensure the derailleur is compatible with your existing shifter. Different brands and even different groupsets within a brand use varying cable pull ratios, meaning a Shimano shifter might not work optimally with a SRAM derailleur, and vice-versa.
- Cassette Range: Check the maximum cog size the derailleur can accommodate. This information is usually listed in the product's specifications. Using a cassette that is too large can lead to poor shifting performance or even damage.
- Chainring Size: While less common for rear derailleurs, some setups might have limitations based on front chainring sizes, especially in 1x (single chainring) systems.
Material and Durability
Derailleurs are often constructed from a combination of aluminum alloy, steel, and sometimes carbon fiber for lighter weight and increased stiffness. Higher-end models tend to use more lightweight and durable materials. Consider your riding conditions; if you frequently ride in mud or harsh weather, a derailleur with robust construction and good sealing will be more beneficial.
Gearing and Speed Count
The number of speeds your bike has (e.g., 9-speed, 10-speed, 11-speed, 12-speed) is a crucial factor. Rear derailleurs are designed to work with a specific number of gears. While some derailleurs may offer a degree of cross-compatibility, it's always best to match the derailleur's speed count to your shifter and cassette for the smoothest operation.
