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Best Rear Derailleur For Mountain Bike (2024 Update)

When it comes to upgrading your mountain bike, the rear derailleur is one component that can make a big difference in your riding experience. With so many options on the market, choosing the best rear derailleur for your mountain bike can seem overwhelming. Before buying a new derailleur, there are a few key factors to consider.

First, think about the terrain and trails you typically ride. Do you stick to smooth, rolling hills or take on more rugged descents? The more aggressive the trails, the more robust a rear derailleur you’ll need. Material is also important – aluminum derailleurs are lightweight yet durable, while carbon fiber models are ideal for cross country riding.

You’ll also want to consider the number of gears. Most mountain bikes today have either 10 or 12 speeds. Make sure to get a derailleur compatible with your current drivetrain. Additionally, the derailleur’s cage length matters – longer cages accommodate larger cassette sprockets.

Ready to upgrade but not sure where to start? Ask yourself these questions to narrow down your options: What’s your budget? How much weight do you want to save? Are you looking for better shifting performance or reliability? Do you ride in muddy or dusty conditions? Keeping these factors in mind will help you select the ideal rear derailleur.

A new rear derailleur can make a big difference on your mountain bike. With an understanding of your riding needs and style, you’ll be ready to choose a model that enhances your trail experience. Ready to feel the difference a derailleur upgrade makes? Let the search begin!

10 Best Rear Derailleur For Mountain Bike

# Product Image Product Name Product Notes Check Price
1
This product is ideal for 6/7-speed road and mountain bikes as a direct mount rear derailleur.
2
It is ideal for mountain bikes with 7/8 speed rear derailleurs and direct mount options.
3
The product is ideal for 9-speed mountain bikes with a direct mount rear derailleur.
4
This product is ideal for mountain bikes with 6/7/8 speed gears and requires a direct mount rear derailleur.
5
The product is ideal for high-performance and reliable shifting on mountain bikes and other bicycles.
6
This product is ideal for adjusting the gear shifting system of mountain bikes and it is compatible with Shimano Sram.
7
The product is ideal for improving the performance of 11-speed Shimano Deore XTR/XT/SLX mountain bike rear derailleurs.
8
This product is ideal for mountain bikes with Shimano or Sram compatible components that require a 10 speed rear derailleur and shift lever.
9
This product is ideal for use on MTB mountain bicycles with 6/7/8 speed hanger mount or direct mount.
10
The product is ideal for mountain bikes that require a 6/7-speed rear derailleur that can be directly mounted.
This product is ideal for 6/7-speed road and mountain bikes as a direct mount rear derailleur.
It is ideal for mountain bikes with 7/8 speed rear derailleurs and direct mount options.
The product is ideal for 9-speed mountain bikes with a direct mount rear derailleur.
This product is ideal for mountain bikes with 6/7/8 speed gears and requires a direct mount rear derailleur.
The product is ideal for high-performance and reliable shifting on mountain bikes and other bicycles.
This product is ideal for adjusting the gear shifting system of mountain bikes and it is compatible with Shimano Sram.
The product is ideal for improving the performance of 11-speed Shimano Deore XTR/XT/SLX mountain bike rear derailleurs.
This product is ideal for mountain bikes with Shimano or Sram compatible components that require a 10 speed rear derailleur and shift lever.
This product is ideal for use on MTB mountain bicycles with 6/7/8 speed hanger mount or direct mount.
The product is ideal for mountain bikes that require a 6/7-speed rear derailleur that can be directly mounted.

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

Looking for a high-quality rear derailleur that can provide smooth shifting and easy installation? Look no further than this excellent product. With a bracket fit that sits neatly under the wheel nut, this derailleur is designed to provide fast, reliable gear changes every time, making it the perfect choice for serious cyclists and casual riders alike.

This derailleur is compatible with 6 and 7-speed SIS INDEX variable speed transmission systems, making it a versatile option that can be used with a wide range of bikes. It also features a B tension adjustment screw, which allows you to fine-tune the distance between the upper guide wheel and the tooth tip of the largest flywheel to ensure optimal performance.

With a maximum sprocket of 34T and a minimum sprocket of 11T, this derailleur is designed to handle a wide range of gears, providing the flexibility you need to tackle any terrain. And thanks to its long cage tourney design, it is also compatible with 11T /14T high speed gear, making it an ideal choice for riders who demand the best performance from their bike.

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

The Shimano RD-M310 (RD-CT95) Altus Rear Derailleur 7/8 Speed / D-ATT Black is a high-quality bike part that is perfect for mountain biking enthusiasts. Designed with the latest technology, this model is both durable and reliable, making it a great choice for riders who demand only the best.

With its compatible 7/8 speeds and maximum rear sprocket of 34T, this derailleur is capable of handling even the toughest terrain. It also boasts a total capacity of 43T, allowing for a wide range of gear options that can be adjusted to suit any riding style.

The Shimano Altus 7/8 Speed Black RD-M310 Mountain Bike Rear Derailleur-Direct Mount is designed with a top-normal (traditional) cage length of short, making it easier to shift gears with precision and accuracy. Its advanced light-action design and Teflon-coated bushings ensure that every gear change is smooth and effortless, giving riders the confidence they need to tackle any trail.

The direct-attach rear derailleur is another great feature of this model, as it allows for easy installation and removal. This means that riders can quickly and easily replace the derailleur if it becomes damaged or worn.

3. Meghna Shimano Altus Rd-M370 Bike Rear Derailleur 9 Speed Direct Mount For Mountain Bike

Introducing the RD-M370 model, a 9-speed rear derailleur that is perfect for mountain and road bikes. This direct mount derailleur is an excellent choice for those who want a smooth and light action shifting performance. Its MEGA 9 DRIVE TRAIN design is specially crafted to ensure that shifting is smooth and easy every time.

The SHIMANO ALTUS M370 rear derailleur has a total capacity of 45T, making it compatible with a wide range of bikes, both mountain and road. This makes it a versatile choice for those who want to upgrade their current bike's performance.

The RD-M370 has a low profile concept that incorporates Double Servo-panta technology, which ensures that the shifting is precise and durable. The Wide Link feature adds to the derailleur's durability and ensures that the shifting is always precise, even under heavy loads.

Experience the smooth and light action shifting performance of the RD-M370 rear derailleur. Its MEGA 9 DRIVE TRAIN design ensures that you can shift gears effortlessly, while its compatibility with 9-speed mountain and road bikes makes it a versatile choice for any rider. Upgrade your bike's performance with the RD-M370 rear derailleur today.

4. Hycline Shimano Rear Derailleur 6/7/8 Speed Direct Mount For Mountain Bike-Black

Introducing the RD-TY300 Rear Derailleur, a high-performance component suitable for 6/7/8 speed bicycles. This exceptional piece is forged with high-hardness aluminum alloy, ensuring a durable and reliable product. The hollow weight-reduction design adds to the component's stability, providing a smoother and more stable speed change.

The RD-TY300 Rear Derailleur boasts precise adjustment capabilities, thanks to its high-hardness aluminum alloy body. This feature allows for slight adjustments in multiple places, ensuring accurate speed change performance. Installation is fast and convenient, making maintenance a breeze. Please note that the rear derailleur is directly mountable and not hub bolt mountable. Before ordering, please check the mount type of the original parts to ensure compatibility.

This versatile component is suitable for use on a variety of bicycles, including mountain bikes, station wagons, and folding bikes. If you have any questions or concerns, our team is always available to provide timely responses and quality service. Upgrade your ride with the RD-TY300 Rear Derailleur and experience a new level of performance and precision.

5. Sram X.5

The Sram X5 rear derailleur is a trailblazing product designed for the world's most passionate trail enthusiasts. With an outer cage constructed of high-quality steel, this rear derailleur is built to last. Available in both black and silver, the X5 is a versatile and stylish addition to any biking setup.

What sets the X5 apart from other rear derailleurs is its exceptional handling capabilities. Whether you're taking on steep inclines or navigating winding trails, the X5 offers unparalleled performance and precision. Its advanced design allows for smooth and effortless shifting, ensuring that you can focus on the ride ahead.

In terms of specifications, the X5 boasts a range of impressive features. Its sturdy steel construction provides superior durability and resistance to wear and tear, while its sleek and stylish design adds a touch of elegance to any bike. With a weight of just 299 grams, the X5 is lightweight and easy to install, making it a great choice for both amateur and professional bikers alike.

6. Bibike 11 Speed Rear Derailleur & Shift Lever For Mountain Bike Compitable With Shimano Sram

This product comes equipped with an 11-speed rear derailleur and shift lever, offering a total weight of approximately 1 pound. It is designed to be compatible with Shimano XT/SLX and Sram XX1/X01/XX0/NX/GX 11 speed systems. With its 1:1 cable pull ratio technology, this derailleur ensures precise and swift shifting performance. The product's enhanced damping technology is also worth noting as it effectively reduces chain jitter, providing a smoother and more comfortable ride. Lastly, it is important to note that the maximum compatible sprocket for this 11 speed rear derailleur is 52t. Overall, this product is an excellent choice for those looking for a reliable and efficient derailleur system that will enhance their cycling experience.

7. Xtr/xt/slx E-Bike Derailleur Upgrade

Upgrade your bike's drivetrain for efficient and superior performance with the Oversized Pulley Wheel Cage by KCNC. This product reduces friction in the pulleys by up to 45%, resulting in a lower rolling resistance and maximized energy return. The OSPW system is proven to be one of the fastest pulley systems in the world, providing energy savings starting from 2.4 watts.

The OSPW for Shimano features a narrow wide tooth profile that ensures durable chain retention. The system consists of 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 this product even further. The oversized pulley wheels have three to five times longer lifetime than commonly used standard pulleys on the market.

This OSPW system is compatible with Shimano XTR M9000/M9050, XT M8000/M8050, and SLX M7000 11s rear derailleur. It is available in black, red, and gold colours and weighs approximately 70 grams.

With its efficiency ratio almost the same as Ceramicspeed, the OSPW system provides optimal performance and energy savings. Upgrade your bike's drivetrain with the KCNC Oversized Pulley Wheel Cage for Shimano and experience superior performance and efficiency.

8. Bibike 10 Speed Rear Derailleur & Shift Lever For Mountain Bike Compitable With Shimano Sram

This 10-speed rear derailleur and shift lever set is a versatile and lightweight option for cyclists of all levels. With a total weight of approximately 1 pound, it won't add unnecessary weight to your bike. It is compatible with Shimano XT/ SLX /Deore & Sram X7/ X9 10-speed systems, making it a great choice for a variety of bikes.

The 1:1 cable pull ratio technology ensures precise and quick shifting performance, allowing you to easily switch gears as needed while riding. The enhanced damping technology helps to reduce chain jitter, providing a smoother ride overall.

This 10-speed rear derailleur has a maximum compatible sprocket of 52t, so you can easily adjust it to suit your needs. Whether you're a casual rider or a competitive cyclist, this derailleur and shift lever set is a reliable and efficient choice that will help you get the most out of your bike.

9. Mohegia Bike Rear Derailleur -6/7/8 Speed Hanger Mount/direct Mount For Mtb Mountain Bicycle

The RD-TY21B rear derailleur is a reliable and high-performing accessory that's perfect for 6/7-speed mountain bikes. It boasts a tough and durable aluminum alloy material that ensures a stable and safe riding experience. The derailleur is also easy to use and maintain, making it a popular choice for MTBs, mountain bikes, road bikes, and even folding bicycles.

It's important to note that the RD-TY21B rear derailleur is a direct mount and not a hub bolt mount. Therefore, it's essential to check the mount type of the original part before placing an order to ensure compatibility.

With its excellent shifting performance, this rear derailleur guarantees a smooth and seamless ride. It's designed to handle even the toughest terrains and conditions, making it an ideal choice for both beginner and experienced riders.

In case you have any questions or concerns, the manufacturer provides quality customer service that you can rely on. So, whether you're a seasoned cyclist or just starting, the RD-TY21B rear derailleur is an excellent investment that you won't regret.

10. Meghna Shimano Rear Derailleur Rd-Tz31-A 6/7 Speed Direct Mount For Mountain Bike

Introducing the RD-TZ31-A Bike Rear Derailleur, a versatile and reliable component that's perfect for your 6/7 speed mountain bike, commuter bike, tricycle, folding bike, and more. It's important to note that this derailleur is a direct mount, not a hub bolt mount, so be sure to choose the correct mount before making your purchase.

Crafted from high-quality, durable aluminum alloy material, this bike rear derailleur is designed to provide excellent shifting performance, ensuring your safety and stability while riding. Its sturdy construction guarantees that it can withstand the wear and tear of daily use, making it a long-lasting and cost-effective investment.

The RD-TZ31-A Bike Rear Derailleur is suitable for a wide range of bikes, including MTBs, mountain bikes, road bikes, folding bicycles, commuter bikes, tricycles, electric bikes, and more. This makes it a versatile and convenient choice for any avid cyclist.

It's worth noting that the company behind this product provides excellent customer service, so you can rest assured that you'll receive helpful and timely assistance if you have any questions or concerns. Overall, the RD-TZ31-A Bike Rear Derailleur is a reliable and high-quality option that's sure to enhance your cycling experience.

Best Rear Derailleur For Mountain Bike FAQs

Can I use a road bike rear derailleur on a mountain bike?

It is not recommended to use a road bike rear derailleur on a mountain bike as the two types of bikes have different requirements for their derailleurs. The main difference between a road and mountain bike derailleur is the amount of chain slack they are designed to handle. A mountain bike derailleur is designed to handle more chain slack than a road bike derailleur due to the larger variation in gears on a mountain bike.

Using a road bike derailleur on a mountain bike can cause shifting issues, as the derailleur may not be able to handle the range of chain slack that is needed for proper shifting on a mountain bike. Additionally, road bike derailleurs are not designed to be as durable as mountain bike derailleurs, and may not be able to withstand the more rugged terrain and abuse that a mountain bike is designed for.

Therefore, it is recommended to use a mountain bike derailleur on a mountain bike to ensure proper shifting and durability.

How do I adjust my rear derailleur for optimal shifting performance on a mountain bike?

To adjust your rear derailleur for optimal shifting performance on a mountain bike, you should follow these steps:

1. First, ensure that your chain and cassette are clean and free of debris, as this can affect shifting performance.

2. Shift your bike into the highest gear (smallest cog) on the rear cassette and the lowest gear (largest chainring) on the front crankset.

3. Turn the barrel adjuster on the rear derailleur counterclockwise until the chain begins to shift up to the next cog. Then turn the barrel adjuster clockwise until the chain shifts smoothly and without hesitation.

4. Shift down to the lowest gear (largest cog) on the rear cassette and the highest gear (smallest chainring) on the front crankset.

5. Use the high/low limit screws on the derailleur to adjust the alignment of the jockey wheel with the smallest cog. The top jockey wheel should be as close to the smallest cog as possible without rubbing.

6. Shift through all gears to ensure smooth and quick shifting. If necessary, make minor adjustments to the barrel adjuster to fine-tune the shifting performance.

By following these steps, you should be able to adjust your rear derailleur for optimal shifting performance on your mountain bike.

How do I choose the best rear derailleur for my specific mountain bike frame?

Choosing the best rear derailleur for your mountain bike frame can be a daunting task, but with some basic knowledge, you can make an informed decision. The first step is to determine what type of rear derailleur your frame requires. This information can usually be found in the owner's manual or by contacting the manufacturer. You will need to know your bike's rear wheel dropouts spacing, the number of speeds on the cassette, and the largest cog size.

Once you have this information, you can start to narrow down your options. Consider your riding style and the terrain you will be riding on. If you are a cross-country rider, you may want a lighter and more efficient rear derailleur. If you are a downhill rider, you may want a more durable and reliable option.

It's also important to consider your budget. There are many options available at different price points, and you don't necessarily need to go for the most expensive option to get a good quality derailleur.

Finally, make sure to read reviews and get recommendations from other mountain bikers. This can help you make a more informed decision and ensure that you choose a rear derailleur that will meet your specific needs.

How often should I replace my rear derailleur on my mountain bike?

The lifespan of a rear derailleur on a mountain bike depends on various factors such as frequency of use, maintenance, riding conditions, and the quality of the derailleur. Generally, a rear derailleur can last anywhere from 2 to 10 years. However, it is recommended to inspect and service your rear derailleur regularly to ensure it is functioning properly. Signs that your derailleur may need replacement include difficulty shifting gears, excessive chain slippage, and visible damage or wear on the derailleur itself. If you notice any of these issues, it may be time to replace your rear derailleur. Ultimately, it is important to prioritize regular maintenance and inspections to extend the lifespan of your bike components and ensure optimal performance on the trails.

What are the top-rated rear derailleurs for mountain bikes?

There are many great options when it comes to rear derailleurs for mountain bikes, but some of the top-rated ones include the Shimano XT M8000, SRAM GX Eagle, and Shimano XTR M9100.

The Shimano XT M8000 is a popular choice among riders due to its durability, smooth shifting, and reasonable price point. It also has a Shadow Plus clutch system that reduces chain slap and keeps the chain in place, even on rough terrain.

The SRAM GX Eagle is another top-rated option, known for its wide gear range and precise shifting. It also has a Roller Bearing Clutch that keeps the chain from bouncing around and helps maintain tension.

Finally, the Shimano XTR M9100 is a high-end option that is lightweight, efficient, and extremely precise. It features a unique design that allows for seamless shifting and minimal chain movement.

Ultimately, the best rear derailleur for you will depend on your specific needs and preferences as a rider. It's important to consider factors such as your riding style, terrain, and budget when making your decision.

What features should I look for in a rear derailleur for mountain biking?

When it comes to choosing a rear derailleur for mountain biking, there are a few key features that you should pay close attention to. Firstly, it's important to consider the number of gears that your derailleur can accommodate. Most mountain bikes these days have 10-12 gears, so you'll want to find a derailleur that can handle that range.

Another important factor is the durability of the derailleur. Look for a model that is constructed from high-quality materials and is designed to withstand the rigors of off-road riding. You'll want a derailleur that can handle the bumps, jumps, and hard landings that come with mountain biking.

Finally, consider the adjustability of the derailleur. A good rear derailleur should be easy to adjust and fine-tune, allowing you to get the perfect shifting performance for your particular bike and riding style.

Other features to look for include a clutch mechanism to help prevent chain slap and dropped chains, as well as compatibility with the type of drivetrain you are using. By taking these factors into account, you can find a rear derailleur that will provide reliable, consistent shifting performance on even the toughest trails.

What is the difference between a Shimano and SRAM rear derailleur for mountain biking?

Shimano and SRAM are two of the most popular brands when it comes to mountain biking components, including rear derailleurs. The main difference between the two is the way they actuate the derailleur to shift gears. Shimano uses a system called Rapidfire, which requires the rider to push a lever with their thumb to shift up and a lever with their index finger to shift down. SRAM, on the other hand, uses a system called Trigger, which has separate levers for up and down shifts and allows for more precise shifting.

Another difference is the number of gears that each brand supports. Shimano typically supports a wider range of gears, while SRAM offers more options for customization. Shimano is also known for having smoother shifting, while SRAM is praised for its durability and ability to handle rough terrain.

Ultimately, the choice between Shimano and SRAM comes down to personal preference and riding style. It's important to test out both brands and see which one feels more comfortable and efficient for your specific needs.

What is the difference between a short cage and long cage rear derailleur for mountain biking?

A short cage and long cage rear derailleur are two different types of components designed for mountain biking. The main difference between the two is the length of the cage which holds the jockey wheels that guide the chain across the cassette.

A short cage derailleur has a shorter cage and is designed for use with smaller cassettes or chainrings. It is ideal for cross-country riding and offers a more responsive shifting experience. Short cage derailleurs are also lighter in weight and offer better clearance, making them a great option for technical mountain bike trails.

On the other hand, a long cage derailleur has a longer cage and is designed for use with larger cassettes or chainrings. This type of derailleur is ideal for all-mountain or enduro riding as it can handle a wider range of gears. Long cage derailleurs are also designed to handle more chain slack, which is necessary when riding over rough terrain or during steep climbs.

In summary, the main difference between a short cage and long cage rear derailleur is the length of the cage and the type of riding they are best suited for. Ultimately, the choice between the two will depend on your riding style and the terrain you plan to ride on.

What is the price range for high-quality rear derailleurs for mountain biking?

The price range for high-quality rear derailleurs for mountain biking can vary depending on the brand, materials used, and level of technology incorporated. Generally, you can expect to spend anywhere from around $50 to $400 or more for a top-of-the-line rear derailleur.

At the lower end of the price range, you can find basic rear derailleurs that are reliable and functional but may not have the same level of precision or durability as more expensive options. However, as you move up in price, you'll typically find derailleurs with more advanced features such as increased gear range, smoother shifting, and lighter weight.

Some of the most reputable brands in the mountain biking industry include Shimano, SRAM, and Campagnolo, all of which offer a range of options to suit different budgets and riding styles. Ultimately, it's important to consider your specific needs as a rider and do your research to find the best rear derailleur for your preferences and budget.

What is the weight difference between different rear derailleurs for mountain biking?

The weight difference between different rear derailleurs for mountain biking can vary depending on the manufacturer, model, and intended use. Generally speaking, high-end rear derailleurs are made from lighter materials such as carbon fiber or titanium, which can significantly reduce their weight compared to lower-end models made from heavier materials like aluminum.

For example, a Shimano XTR rear derailleur can weigh as little as 200-250 grams, while a Shimano Deore rear derailleur can weigh around 300-350 grams. Similarly, a SRAM XX1 rear derailleur can weigh around 220-250 grams, while a SRAM NX rear derailleur can weigh around 300-350 grams.

It's important to note that while weight can be a factor in choosing a rear derailleur, other factors such as durability, shifting performance, and compatibility with the rest of your drivetrain should also be considered when making a purchasing decision. Additionally, a few grams difference in weight may not make a significant difference in performance for most riders, so it's important to prioritize your needs and preferences when selecting a rear derailleur.

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