Best Rear Derailleur For Mountain Bike (2024 Updated)

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As a mountain bike enthusiast, you would agree that having the best rear derailleur for your bike can make all the difference in your performance on the trails. The rear derailleur is responsible for shifting the chain between gears, which is essential in maintaining a smooth and efficient ride. However, with so many options available in the market, finding the best one for your bike can be a daunting task.

To help you make an informed decision, we have compiled a list of key points to consider when looking for the best rear derailleur for your mountain bike. Firstly, you need to consider the number of gears on your bike and ensure that the derailleur is compatible with your cassette. Secondly, the weight of the derailleur is an important factor to consider, as a lighter derailleur can improve your bike's overall performance. Thirdly, the durability of the derailleur is essential, especially if you plan on taking your bike on rough terrains. Fourthly, the shifting performance of the derailleur is crucial in ensuring smooth and efficient gear changes. Lastly, the price of the derailleur should be considered, as it should fit within your budget.

In summary, when looking for the best rear derailleur for your mountain bike, you should consider the compatibility, weight, durability, shifting performance, and price. By taking these factors into consideration, you will be able to find a rear derailleur that meets your needs and enhances your riding experience.

10 Best Rear Derailleur For Mountain Bike

1. Dynalion 26" Fat Tire Mountain E-Bike With 750w Bafang Motor, 48v16ah Battery, Shimano 7-Speed Derailleur, And Ul Certification.

The Dynalion 26" x 4" Fat Wide Tire EBike is a powerful and versatile electric bike designed for adults. With its comfortable riding experience, multi-function LCD display, front and rear LED lights, adjustable seats, hydraulic shock-absorbing front fork, and fat wide tires, this bike allows you to ride on roads, mountains, beaches, and other terrain with ease and comfort.

This eBike is equipped with a 48V 750W high-speed Bafang motor that provides strong power up to 25mph. The maximum speed assist mode is 25MPH, and the throttle speed is 28MPH. The range of this eBike is 25 to 40+ miles assist and 25+ miles on pure electric power. With its powerful motor and long-range capability, this eBike is perfect for commuting, touring, or exploring any terrain.

The Dynalion 26" x 4" Fat Wide Tire EBike comes with a removable 48V/16AH lithium-ion battery that can travel 25-40+ miles per full charge. The battery is removable, making it convenient to take home or recharge in the office. The battery also has a USB port, which can charge the phone while riding. This feature makes it a perfect eBike for those who need to stay connected while on the move.

This eBike is UL certified, ensuring its safety and quality. The UL certification means that the bike has been rigorously tested and meets the highest safety standards. The Dynalion 26" x 4" Fat Wide Tire EBike also comes with a one-year warranty for motors, batteries, chargers, and controllers, and the frame has a three-year warranty. This warranty ensures that any defects or issues with the bike will be resolved promptly and efficiently.

In conclusion, the Dynalion 26" x 4" Fat Wide Tire EBike is a powerful and versatile electric bike that provides a comfortable riding experience, strong power, and long-range capability. It is perfect for commuting, touring, or exploring any terrain. With its removable lithium-ion battery, USB port, and one-year warranty, this eBike is a reliable and convenient choice for anyone looking for an electric bike.

2. Mongoose Malus Men's 26" Fat Tire Mountain Bike With Steel Frame, 7-Speed Drivetrain, Shimano Rear Derailleur, Disc Brakes In Matte Black.

The Mongoose Malus Mens Adult Fat Tire Mountain Bike is the perfect choice for those who love to explore the outdoors on two wheels. This bike comes equipped with a sturdy steel frame that is designed to handle the toughest of terrains. The 26-inch wheels are ideal for riders who are between 64 to 74 inches tall, ensuring a comfortable and safe ride.

The 7-speed twist shifters on this bike provide quick and precise gear changes, allowing riders to easily navigate through different terrains. This feature is especially important when riding on mountainous or hilly terrain, where gear changes are required frequently. Additionally, the Shimano rear derailleur ensures that gear changes are smooth and effortless.

The Mongoose Malus also comes equipped with front and rear disc brakes that provide secure stopping power. This feature is especially important when riding on steep downhill sections or when navigating through tricky terrain. The disc brakes ensure that riders can stop the bike quickly and safely, giving them greater control over their ride.

The bike also features aluminum crank arms that provide optimal gearing, ensuring that riders can pedal with ease even on the toughest of terrains. The 26 x 4-inch all-terrain fat tires provide extra stability on dirt, sand, and snow. This feature is especially important when riding on loose or uneven surfaces, as it ensures that riders can maintain balance and control over their ride.

Overall, the Mongoose Malus Mens Adult Fat Tire Mountain Bike is an excellent choice for those who love to explore the outdoors on two wheels. It is a rugged and reliable bike that is designed to handle the toughest of terrains, and its features make it an ideal choice for riders of all skill levels. Whether you are a seasoned mountain biker or a beginner, the Mongoose Malus is sure to provide you with an enjoyable and safe riding experience.

3. Shimano Rd-Tz31-A 6/7 Speed Rear Derailleur For Mountain, Tricycle, Commuter, And Folding Bikes (Direct Mount)

The Shimano Bike Rear Derailleur RD-TZ31-A is a high-quality and durable component designed specifically for mountain bikes, commuter bikes, tricycles, folding bikes, and other similar bicycles. It is a direct mount derailleur that is compatible with 6/7 speed bikes and is made from high-quality aluminum alloy material that ensures excellent performance and stability while riding.

This bike rear derailleur is an essential component that ensures smooth shifting and enhances the overall performance of the bike. It is designed to provide a safe and stable riding experience, particularly on challenging terrains. The Shimano Bike Rear Derailleur RD-TZ31-A is a reliable and efficient bike component that has been tested and proven to be an excellent choice for riders who enjoy cycling in different environments.

It is essential to note that the Shimano Bike Rear Derailleur RD-TZ31-A is a direct mount derailleur and not a hub bolt mount derailleur. Therefore, it is crucial to choose the right mounting option before purchasing. This component is easy to install, and it is compatible with a wide range of bikes, including MTBs, road bikes, folding bicycles, commuter bikes, tricycles, and electric bikes.

The Shimano Bike Rear Derailleur RD-TZ31-A is made from high-quality materials that are designed to withstand harsh conditions and provide reliable performance for an extended period. It is a durable and long-lasting component that is designed to offer excellent shifting performance, ensuring that you enjoy a smooth and comfortable ride.

The Shimano Bike Rear Derailleur RD-TZ31-A comes with excellent customer service, and the manufacturer provides a reliable and helpful team to assist you with any questions or concerns about the product. They are committed to providing their customers with the best service possible, and they are always available to offer assistance whenever it is needed.

In conclusion, the Shimano Bike Rear Derailleur RD-TZ31-A is an excellent choice for riders who want to enhance the performance of their bikes. It is a reliable and efficient component that is designed to provide a safe and stable riding experience. With its excellent shifting performance and durable construction, it is an excellent investment for any cyclist who wants to enjoy a smooth and comfortable ride.

4. Meghna Shimano Altus Rear Derailleur Rd-M310 7/8 Speed Mountain Bike Rear Derailleur Direct Mount

The MEGHNA Shimano Altus Rear Derailleur RD-M310 is a high-quality, reliable choice for mountain bike enthusiasts. This rear derailleur is designed to provide smooth and accurate shifting for 7/8 speed bikes, ensuring that riders can easily navigate the terrain and enjoy a comfortable ride.

The RD-M310 is compatible with 7/8 speeds and features a maximum rear sprocket of 34T, with a total capacity of 43T. Its long cage length provides ample room for riders to switch between gears and tackle steep inclines or declines with ease.

This Shimano Altus 7/8 Speed Black RD-M310 Mountain Bike Rear Derailleur-Direct Mount is designed with a top-normal (traditional) derailleur action. It features an advanced light-action design that is complemented by Teflon-coated bushings, which ensure that the derailleur operates smoothly and with minimal friction.

The direct-attach rear derailleur design of the RD-M310 is both efficient and reliable, ensuring that the derailleur stays securely in place and does not slip or cause any damage to the bike's frame. The durable construction of the RD-M310 ensures that it can withstand the rigors of off-road cycling, making it a great choice for mountain bikers who demand the best.

In conclusion, the MEGHNA Shimano Altus Rear Derailleur RD-M310 is a top-of-the-line option for mountain bikers who want a reliable and high-performing rear derailleur. Its advanced design, smooth operation, and direct-attach mounting make it an excellent choice for anyone who loves to explore the great outdoors on two wheels.

5. Meghna Shimano Tourney Rd-Ty300 6/7-Speed Rear Derailleur Road Mtb Bike Mountain Bike Direct Mount

The MEGHNA Shimano Tourney RD-TY300 6/7-Speed Rear Derailleur is a high-quality component designed for road, mountain, and hybrid bicycles. This rear derailleur offers smooth shifting, making it easy to change gears quickly and effortlessly. It is also easy to install, making it a great option for those who want to upgrade their bike's performance.

This derailleur is a long cage tourney model that is compatible with 11T/14T high-speed gears. It is designed to work with 6 and 7-speed SIS INDEX variable speed transmission systems, providing riders with a wide range of gear options. The B tension adjustment screw allows for easy customization of the distance between the upper guide wheel and the tooth tip of the largest flywheel, ensuring optimal performance.

The MEGHNA Shimano Tourney RD-TY300 6/7-Speed Rear Derailleur is built to last, with a durable construction that can withstand the demands of regular use. It has a maximum sprocket size of 34T and a minimum sprocket size of 11T, providing riders with the versatility they need to tackle any terrain.

The long cage tourney derailleur is designed for use with 11T/14T high-speed gears, making it an ideal choice for riders who want to improve their bike's performance. The direct mount design ensures a secure fit, providing riders with the confidence they need to ride with ease.

Overall, the MEGHNA Shimano Tourney RD-TY300 6/7-Speed Rear Derailleur is an excellent choice for anyone looking to upgrade their bike's shifting performance. With its smooth shifting, easy installation, and durable construction, this derailleur is sure to provide riders with the performance they need to tackle any terrain with ease.

6. Shimano Enbo Rd-Ty300 6/7 Speed Direct Mount Rear Derailleur For Road And Mtb Bikes.

The ENBO Shimano Bike Rear Derailleur RD-TY300 is a reliable choice for cyclists who want a smooth and stable riding experience. This rear derailleur model is compatible with 6 and 7-speed SIS INDEX variable speed transmission systems, and can support 11T /14T high speed gear.

Constructed from durable aluminum alloy material, the RD-TY300 offers excellent shifting performance that ensures safe and stable riding. The smooth shifting mechanism guarantees a seamless transition between gears, making it easier for cyclists to navigate different terrains.

This rear derailleur is easy to use and maintain, making it a versatile option for various types of bicycles. It's suitable for MTBs, mountain bikes, road bikes, folding bicycles, and more. The direct mount design of this derailleur makes it easy to install and remove, making it a convenient option for those who prefer to do their bike maintenance at home.

The ENBO Shimano Bike Rear Derailleur RD-TY300 is designed to provide stability and reliability for cyclists, ensuring that their rides are safe and enjoyable. If you have any questions about this product, the manufacturer offers quality service to help you with your concerns.

In summary, the ENBO Shimano Bike Rear Derailleur RD-TY300 is a high-quality rear derailleur that offers excellent shifting performance, durability, and versatility. It's a great choice for cyclists who want a reliable option for their bikes.

7. Kcnc Sxx1 Mtb Bike Rear Derailleur Ospw System For Sram Eagle 12 Speed (Black)

Upgrade your mountain bike's drivetrain with the KCNC SXX1 Mountain MTB Bicycle Bike Rear Derailleur Oversized Pulley Wheel System Cage OSPW for Sram Eagle XX1/X01/GX/NX Mechanical 12 Speed use. This innovative system features oversized pulley wheels, reducing friction in the pulleys by up to 45% and providing optimal performance.

The KCNC Wheel Bearings also help to reduce friction, resulting in lower rolling resistance and maximum energy efficiency. With overall power savings of 30%-60%, or more in some cases, this system is a must-have for serious mountain bikers looking for superior performance.

Featuring a narrow-wide tooth profile, the OSPW for SRAM Eagle Mechanical ensures durable chain retention. The system includes top 14t and bottom 16t alloy pulley wheels fitted with low friction bearings and a lightweight cage made from 7075 Alloy. Coated bearings prolong the lifetime of the system even further, making it a long-lasting investment for your bike.

The oversized pulley wheels are designed to have 3-5 times longer lifetime than commonly used standard pulleys on the market. This system is compatible with Sram Eagle XX1/X01/GX/NX Mechanical 12 speed rear derailleur and has been proven to be the fastest pulley system in the world, providing energy savings starting from 2.4 watts.

The KCNC SXX1 Mountain MTB Bicycle Bike Rear Derailleur Oversized Pulley Wheel System Cage OSPW is available in black, red, and gold, making it easy to match your bike's style. With a weight of approximately 71 grams, this system is lightweight and easy to install.

Overall, the KCNC SXX1 Mountain MTB Bicycle Bike Rear Derailleur Oversized Pulley Wheel System Cage OSPW is a must-have upgrade for any serious mountain biker looking to maximize their energy efficiency and performance. Its innovative design and durable construction make it a long-lasting investment that will provide superior performance for years to come.

8. 8 Speed Mtb Shifter With 3 Speed Front Derailleur Clamp And Direct Mount Rear Derailleur For 6-11 Speed Bikes.

The Mountain Bike Shifter 8 Speed, 3 Speed Clamp On Front Derailleur, and Bike Rear Derailleur 6/7/8/9/10/11 Speed Direct Mount is a high-quality bike gear shift lever suitable for a wide range of bikes. The package includes one pair of bike shifters with cables, one front bike derailleur, and one rear derailleur.

The bike shifters are designed for 8-speed bicycles and have a 3X8 thumb gear shifter cable. They come in a pair and include the left and right shifters. These shifters are easy to use and provide precise shifting, making them ideal for mountain biking and other challenging terrain.

The front bike derailleur is a 3-speed clamp-on derailleur that is compatible with top or bottom routing. It comes with an adjustable clamp size of 31.8mm or 34.9mm, making it easy to install and use. This derailleur is perfect for those who want to upgrade their bike's shifting performance and need a reliable and durable option.

The bike rear derailleur is a direct mount derailleur suitable for 6/7/8/9/10/11 speed bikes. It has a long cage and is not a hanger mount. This derailleur is designed to provide smooth and precise shifting, making it ideal for mountain biking and other challenging terrains.

This mountain bike shifter and derailleur set is suitable for a wide range of bikes, including BMX bikes, cruisers, electric bikes, folding bikes, hybrid bikes, and mountain bikes. It is easy to install and use, making it a great choice for beginners and experienced riders alike.

In conclusion, the Mountain Bike Shifter 8 Speed, 3 Speed Clamp On Front Derailleur, and Bike Rear Derailleur 6/7/8/9/10/11 Speed Direct Mount are high-quality bike components that provide smooth and precise shifting. They are easy to install and use, making them a great choice for anyone looking to upgrade their bike's shifting performance.

9. Kcnc Sxt Mountain E-Bike Oversized Pulley Rear Derailleur Cage For Shimano 11 Speed, Gold.

The KCNC SXT Mountain E-Bike Bicycle Bike Oversized Pulley Rear Derailleur Cage OSPW is a high-performance drivetrain upgrade that promises ultimate efficiency and superior performance. This product is specifically designed to reduce friction, resulting in lower rolling resistance and improved power transfer.

The Oversized Pully Wheel (OSPW) system reduces friction in the pulleys by up to 45%, which translates to optimized performance and significant energy savings. In fact, the OSPW system can provide energy savings of up to 30-60% over a stock setup, making it a worthwhile investment for serious cyclists.

The OSPW for Shimano features a narrow-wide tooth profile that ensures durable chain retention. The system comprises top 14t and bottom 16t alloy pulley wheels fitted with low-friction bearings and a lightweight cage made from 7075 Alloy. The coated bearings further prolong the lifetime of this product, making it a durable and long-lasting option for cyclists.

This Oversized Pulley Wheels System is compatible with Shimano XTR M9000/M9050, XT M8000/M8050, and SLX M7000 11s rear derailleurs. The system has been proven to be the fastest pulley system in the world, providing energy savings starting from 2.4 watts. The efficiency ratio of this product is almost the same as that of Ceramicspeed, making it a reliable and high-quality option.

The KCNC SXT Mountain E-Bike Bicycle Bike Oversized Pulley Rear Derailleur Cage OSPW is made from high-quality materials, including AL7075 Fully CNC material. This product is available in black, red, and gold colors, and weighs approximately 70 grams.

In summary, the KCNC SXT Mountain E-Bike Bicycle Bike Oversized Pulley Rear Derailleur Cage OSPW is an excellent upgrade for serious cyclists who want to maximize their energy return and improve their performance. Its durable design, compatibility with Shimano derailleurs, and energy-saving capabilities make it a worthwhile investment for any cyclist looking to take their riding to the next level.

10. Mohegia Bike Rear Derailleur Rd-Ty21b 6/7 Speed Direct Mount For Mountain Bicycle-Black

The MOHEGIA Bike Rear Derailleur RD-TY21B is a high-quality component designed to enhance the performance of 6/7 speed mountain bikes. It is a direct mount derailleur that is easy to install and maintain. However, it is important to note that it is not compatible with hub bolt mount systems. Therefore, before ordering, users should ensure that their bike's original part is of the direct mount type.

The MOHEGIA Bike Rear Derailleur RD-TY21B is made of durable aluminum alloy material that ensures the longevity of the component. It provides excellent shifting performance that guarantees safe and stable riding. This rear derailleur is designed to withstand the rigors of off-road riding, making it an ideal choice for mountain bikes.

The MOHEGIA Bike Rear Derailleur RD-TY21B is versatile and can be used on a wide range of bicycles, including MTBs, mountain bikes, road bikes, and folding bicycles. It is easy to use and maintain, making it a perfect choice for cycling enthusiasts of all levels.

In case users have any questions or concerns about the product, MOHEGIA provides quality customer service to respond to their needs. Overall, the MOHEGIA Bike Rear Derailleur RD-TY21B is a reliable and high-performance component that can improve the riding experience of any cycling enthusiast.

Best Rear Derailleur For Mountain Bike FAQs

Are there any specific types of mountain biking that require a different type of rear derailleur than others?

No, there are no specific types of mountain biking that require a different type of rear derailleur than others. The type of rear derailleur required for mountain biking is determined by the number of gears on the bike and the type of drivetrain being used. Most modern mountain bikes use a 1x, 2x or 3x drivetrain, which means they have one, two or three chainrings in the front, respectively. The rear derailleur must be compatible with the number of gears on the bike and the size of the cassette. Additionally, some riders may prefer a certain type of derailleur for their riding style, such as a clutch derailleur for rough terrain or a lightweight derailleur for racing. However, these preferences are not specific to a certain type of mountain biking and can be used across different disciplines.

How important is the weight of a rear derailleur when considering the best option for a mountain bike?

The weight of a rear derailleur is an important consideration when choosing the best option for a mountain bike. A lighter derailleur can improve overall bike performance by reducing the amount of weight the rider has to pedal and making the bike easier to handle on technical terrain. However, weight should not be the only factor considered when choosing a rear derailleur. Durability, shifting performance, and compatibility with the bike's drivetrain are also important factors to consider. Riders should balance the weight of the derailleur with their specific riding needs and budget to make an informed decision. Ultimately, the best rear derailleur for a mountain bike will vary based on the rider's individual preferences and riding style.

What are some of the most common issues with rear derailleurs for mountain bikes and how can they be avoided?

The most common issues with rear derailleurs for mountain bikes are misalignment, cable tension, worn jockey wheels, and bent derailleur hangers. Misalignment can cause the chain to rub against the derailleur or chainring, leading to poor shifting performance. Cable tension that is too low can result in sluggish shifting, while high tension can cause the derailleur to skip gears or shift erratically. Worn jockey wheels can cause the chain to jump or slip, while a bent derailleur hanger can cause the derailleur to function improperly.

To avoid these issues, regular maintenance and inspection are crucial. Ensure that the derailleur hanger is straight and that the jockey wheels are in good condition. Check cable tension and adjust as necessary. Use a derailleur alignment tool to ensure proper alignment. Additionally, avoid shifting under load, as this can put undue stress on the derailleur and cause damage.

What are some of the most popular brands of rear derailleurs for mountain bikes and how do they compare to one another?

There are several popular brands of rear derailleurs for mountain bikes, including Shimano, SRAM, Campagnolo, and MicroSHIFT. Shimano is the most widely used brand and offers a range of options to suit different riding styles and budgets. SRAM is known for its innovative technologies, such as the X-Sync chainring and the Eagle 12-speed drivetrain. Campagnolo is a high-end brand that offers precision shifting and durability. MicroSHIFT is a lesser-known brand that offers affordable options for entry-level mountain bikes.

When comparing the different brands, it's important to consider factors such as price, durability, weight, and compatibility with other components. Shimano and SRAM are both known for their durability, while Campagnolo offers precision shifting. MicroSHIFT is a good option for those on a budget but may not offer the same level of performance as the other brands. Ultimately, the best rear derailleur for a mountain bike will depend on the rider's individual needs and preferences.

What are the key features to look for in a high-quality rear derailleur for a mountain bike?

A high-quality rear derailleur for a mountain bike should have several key features. Firstly, it should be durable and able to withstand the rigors of off-road riding. This means it should be made from high-quality materials such as aluminum or carbon fiber. Additionally, it should have a strong spring mechanism that can handle the tension required for shifting gears on steep hills and rough terrain.

Another important feature is precision. A high-quality derailleur should shift smoothly and quickly, without any lag or hesitation. This is important for maintaining speed and control on technical trails.

Finally, a good derailleur should be adjustable and easy to maintain. It should have a range of adjustment options for fine-tuning the shifting performance, and it should be easy to access and maintain the internal components.

Overall, a high-quality rear derailleur for a mountain bike should be durable, precise, and easy to maintain, with a range of adjustment options for optimal performance.

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