When you shop through links on our site, we may earn an affiliate commission. This educational content is not intended to be a substitute for professional advice.

20 Best Derailleur For Mountain Bike (2023 Updated)

The derailleur is the component of a mountain bike that is responsible for changing gears. It consists of a cage that holds two pulleys, which the chain runs through, and a spring-loaded arm that moves the cage back and forth.

When the rider shifts their weight, the arm is moved and the cage is pulled either forward or backward, which in turn moves the chain from one sprocket to another. This allows the rider to change gears, which is necessary when riding on different terrain.

20 Best Derailleur For Mountain Bike

Product Image Product Name Features Price

Shimano Deore RD-M6000-SGS Rear Derailleur-Black

  • Compatible with wide range cassettes (GS = up to 42T), optimized for trail use
  • Shadow+design for improved stability and chain retention

SRAM Force eTap AXS Rear Derailleur

  • Medium Cage 36t Max

SRAM GX Eagle 12-Speed Rear Derailleur Lunar, 52T

  • Long Cage 52t Max

SRAM GX 1×11 Rear Derailleur Black, Long Cage

  • Engineered for smooth and reliable shifting action
  • Cage lock technology
  • X-Horizon design reduces shift force, ghost shifting and chain slap

Shimano Deore RD-M5120 Rear Derailleur SGS, 10/11 Speed

  • Material: aluminum
  • Capacity: 41t
  • Cassette Range: [2 x 11/10] 42t, [1 x 10] 46t

Shimano Saint Rd-m820-ss Rear Derailleur

  • Saint-specific Shadow Plus design with integrated urethane bump stopper doubling-down on Shadow Plus functionality
  • Mode Converter allows the derailleur to track different type of cogsets

SRAM NX Eagle 12 Speed Rear Derailleur – Black

  • Revolutionary innovation
  • Performance that is simply second to none
  • Achieve the ultimate ride

Shimano Deore RD-M6000-GS Rear Derailleur

  • Compatible with wide range cassettes (GS = up to 42T), optimized for trail use
  • Shadow+design for improved stability and chain retention

Microshift XLE Rear Derailleur – 10 Speed Long Cage Black

  • Compatible with wide range cassettes
  • Strong spring tension for enhanced chain stability
  • Compatible with Shimano 10 and 11-speed mountain systems

Shimano GRX RD-RX812 11-Speed Rear Derailleur

  • For 1x drivetrains
  • Compatible with Shimano road Dual Control Levers
  • Gravel-tuned clutch tension provides smooth and reliable mixed surface shifting

Shimano RD-M7100 SLX SGS 12 Speed Rear Derailleur

  • Hyperglide+ offers fast and shockless shifting
  • Silent and stable operation in all gears
  • Low-profile design

Shimano XT RD-M8000-SGS Rear Derailleur – 11 Speed – Long Cage

  • Light Shift Operation With 20% Less Effort
  • Improved chain stability
  • Efficient Shifting And Smoother Driving

Microshift M26 Rear Derailleur – Long Cage (Black)

  • Long Cage

Shimano Deore XT Di2 RD-M8050-GS Rear Derailleur

  • Accurate and stable shifting in any condition
  • Instant response
  • Customized shift speed within Multi-shift

Shimano RD-M8100 XT SGS 12 Speed Rear Derailleur

  • RD-M8100

Shimano SLX Dyna-Sys 3×10 Mountain Bicycle Front Derailleur – FD-M671A, White

  • Side pull cable routing
  • Dyna-Sys 10-speed MTB drivetrain compatibility
  • For 66-69 degree chainstay angle

Microshift Mezzo M36 8/9-Speed Rear Derailleur Black Long Cage

  • Weight saving aluminum bracket body and outer link
  • Steel pulley cage for extra chain-rub durability
  • Compatible with Shimano 8 and 9-speed mountain and road systems

Shimano Dura-Ace RD-R9100 11-Speed Rear Derailleur

  • Stable Shifting Performance.
  • Pulley Follow-Up In Certain Distance.
  • Shimano Shadow Rd Construction.

SRAM X3 Rear Derailleur – Speed Long Cage Black

  • Material: aluminum
  • Weight: 295 g
  • Speeds: 8/7

Shimano RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur

  • Fr
Shimano Deore RD-M6000-SGS Rear Derailleur-Black
  • Compatible with wide range cassettes (GS = up to 42T), optimized for trail use
  • Shadow+design for improved stability and chain retention
SRAM Force eTap AXS Rear Derailleur
  • Medium Cage 36t Max
SRAM GX Eagle 12-Speed Rear Derailleur Lunar, 52T
  • Long Cage 52t Max
SRAM GX 1×11 Rear Derailleur Black, Long Cage
  • Engineered for smooth and reliable shifting action
  • Cage lock technology
  • X-Horizon design reduces shift force, ghost shifting and chain slap
Shimano Deore RD-M5120 Rear Derailleur SGS, 10/11 Speed
  • Material: aluminum
  • Capacity: 41t
  • Cassette Range: [2 x 11/10] 42t, [1 x 10] 46t
Shimano Saint Rd-m820-ss Rear Derailleur
  • Saint-specific Shadow Plus design with integrated urethane bump stopper doubling-down on Shadow Plus functionality
  • Mode Converter allows the derailleur to track different type of cogsets
SRAM NX Eagle 12 Speed Rear Derailleur – Black
  • Revolutionary innovation
  • Performance that is simply second to none
  • Achieve the ultimate ride
Shimano Deore RD-M6000-GS Rear Derailleur
  • Compatible with wide range cassettes (GS = up to 42T), optimized for trail use
  • Shadow+design for improved stability and chain retention
Microshift XLE Rear Derailleur – 10 Speed Long Cage Black
  • Compatible with wide range cassettes
  • Strong spring tension for enhanced chain stability
  • Compatible with Shimano 10 and 11-speed mountain systems
Shimano GRX RD-RX812 11-Speed Rear Derailleur
  • For 1x drivetrains
  • Compatible with Shimano road Dual Control Levers
  • Gravel-tuned clutch tension provides smooth and reliable mixed surface shifting
Shimano RD-M7100 SLX SGS 12 Speed Rear Derailleur
  • Hyperglide+ offers fast and shockless shifting
  • Silent and stable operation in all gears
  • Low-profile design
Shimano XT RD-M8000-SGS Rear Derailleur – 11 Speed – Long Cage
  • Light Shift Operation With 20% Less Effort
  • Improved chain stability
  • Efficient Shifting And Smoother Driving
Microshift M26 Rear Derailleur – Long Cage (Black)
  • Long Cage
Shimano Deore XT Di2 RD-M8050-GS Rear Derailleur
  • Accurate and stable shifting in any condition
  • Instant response
  • Customized shift speed within Multi-shift
Shimano RD-M8100 XT SGS 12 Speed Rear Derailleur
  • RD-M8100
Shimano SLX Dyna-Sys 3×10 Mountain Bicycle Front Derailleur – FD-M671A, White
  • Side pull cable routing
  • Dyna-Sys 10-speed MTB drivetrain compatibility
  • For 66-69 degree chainstay angle
Microshift Mezzo M36 8/9-Speed Rear Derailleur Black Long Cage
  • Weight saving aluminum bracket body and outer link
  • Steel pulley cage for extra chain-rub durability
  • Compatible with Shimano 8 and 9-speed mountain and road systems
Shimano Dura-Ace RD-R9100 11-Speed Rear Derailleur
  • Stable Shifting Performance.
  • Pulley Follow-Up In Certain Distance.
  • Shimano Shadow Rd Construction.
SRAM X3 Rear Derailleur – Speed Long Cage Black
  • Material: aluminum
  • Weight: 295 g
  • Speeds: 8/7
Shimano RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur
  • Fr

1. Shimano Deore RD-M6000-SGS Rear Derailleur-Black

Shimano Deore RD-M6000-SGS Rear Derailleur-Black

  • Compatible with wide range cassettes (GS = up to 42T), optimized for trail use
  • Shadow+design for improved stability and chain retention
  • Dyna-Sys compatible
  • Light shifting effort
  • GS: for 1X and double cranksets; SGS: for triple cranksets

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay
Walmart
Performance Bicycle

Product Details

Specifications

Details
Largest Cog 36
Rear Derailleur Mount Type 10×1 Standard, Shimano Rear Direct Mount
Chain Wrap Capacity (teeth) 43
Cage Length Long
Rear Der/Shifter Compatibility Shimano DynaSys

Reviews From Real Customers

to.hon9
Richard
TJS

2. SRAM Force eTap AXS Rear Derailleur

SRAM Force eTap AXS Rear Derailleur

  • Medium Cage 36t Max

Check Latest Price

Sold By Price
Amazon.com – Seller
Gambacicli US
Jenson USA
Bicycle World

Product Details

Specifications

Details
Group Force eTap AXS
Speed 12
Cage Length Medium Cage
Clutched No
Intended Use Road

Reviews From Real Customers

Justin
sigmasports.com
JDH

3. SRAM GX Eagle 12-Speed Rear Derailleur Lunar, 52T

SRAM GX Eagle 12-Speed Rear Derailleur Lunar, 52T

  • Long Cage 52t Max

Check Latest Price

Sold By Price
Amazon.com – Seller
Competitive Cyclist
REI
Backcountry.com

Product Details

Specifications

Details
Size 52T

Reviews From Real Customers

nmhatern
Kyle C
Matt S

4. SRAM GX 1×11 Rear Derailleur Black, Long Cage

SRAM GX 1x11 Rear Derailleur Black, Long Cage

  • Engineered for smooth and reliable shifting action
  • Cage lock technology
  • X-Horizon design reduces shift force, ghost shifting and chain slap
  • Sporting goods

Check Latest Price

Sold By Price
Amazon.com – Seller
Jenson USA
All4cycling
Performance Bicycle

Product Details

Specifications

Details
Weight 1 lb

Reviews From Real Customers

Kai G.
Matt

5. Shimano Deore RD-M5120 Rear Derailleur SGS, 10/11 Speed

Shimano Deore RD-M5120 Rear Derailleur SGS, 10/11 Speed

  • Material: aluminum
  • Capacity: 41t
  • Cassette Range: [2 x 11/10] 42t, [1 x 10] 46t
  • Gearing: [long] 2 x 11, 2 x 10, 1 x 10
  • Compatibility: HG-X11 11-speed, HG-X 10-speed

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay
Walmart
REI

Product Details

Specifications

Details
Compatible chain HG-X11 11-speed HG-X 10-speed
Total capacity 41T
Fluoric coated link bushings 4
Max. front difference 10T
Pulley cage SGS

6. Shimano Saint Rd-m820-ss Rear Derailleur

Shimano Saint Rd-m820-ss Rear Derailleur

  • Saint-specific Shadow Plus design with integrated urethane bump stopper doubling-down on Shadow Plus functionality
  • Mode Converter allows the derailleur to track different type of cogsets
  • DH mode is a close ratio mode to track up to a 23T-28T low gear
  • AM mode is optimized for a wider ratio cogset with a 32T

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay
Jenson USA
Ride Bicycles

Product Details

Specifications

Details
keyword search Shimano2018
Largest Cog 36
Rear Derailleur Mount Type 10×1 Standard , Shimano Rear Direct Mount
Chain Wrap Capacity (teeth) 25
Cage Length Short

Reviews From Real Customers

The Bruiser
Armon
Tom

7. SRAM NX Eagle 12 Speed Rear Derailleur – Black

SRAM NX Eagle 12 Speed Rear Derailleur - Black

  • Revolutionary innovation
  • Performance that is simply second to none
  • Achieve the ultimate ride

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay
Merlin Cycles
REI

Product Details

Specifications

Details
Size 12 Speed

8. Shimano Deore RD-M6000-GS Rear Derailleur

Shimano Deore RD-M6000-GS Rear Derailleur

  • Compatible with wide range cassettes (GS = up to 42T), optimized for trail use
  • Shadow+design for improved stability and chain retention
  • Dyna-Sys compatible
  • Light shifting effort
  • GS: for 1X and double cranksets; SGS: for triple cranksets

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay
Walmart
Thunder Mountain Bikes

Product Details

Specifications

Details
Compatible chain HG-X 10 Speed
Low sprocket Max 42T
Max. front difference 10T
Rear speeds 10
Top-Normal Spring Type Shimano Shadow RD+

9. Microshift XLE Rear Derailleur – 10 Speed Long Cage Black

Microshift XLE Rear Derailleur - 10 Speed Long Cage Black

  • Compatible with wide range cassettes
  • Strong spring tension for enhanced chain stability
  • Compatible with Shimano 10 and 11-speed mountain systems

Check Latest Price

Sold By Price
Amazon
Walmart
Jenson USA
Performance Bicycle

Product Details

Specifications

Details
Cage Length Long
Cassette Spacing Shimano / SRAM 10
Chain Wrap Capacity 47
Derailleur Mount Style 10×1 Standard
Largest Cog 42

Reviews From Real Customers

REYNALDO
Chucklez
Christopher

10. Shimano GRX RD-RX812 11-Speed Rear Derailleur

Shimano GRX RD-RX812 11-Speed Rear Derailleur

  • For 1x drivetrains
  • Compatible with Shimano road Dual Control Levers
  • Gravel-tuned clutch tension provides smooth and reliable mixed surface shifting

Check Latest Price

Sold By Price
Amazon
evo.com
Performance Bicycle
Bicycle World

Product Details

Specifications

Details
Cage Length long
Capacity 31t
Cassette Range [maximum] 11 – 42t, [minimum] 11 – 40t
Gearing 1×11
Compatibility current road dual control lever, GRX levers

11. Shimano RD-M7100 SLX SGS 12 Speed Rear Derailleur

Shimano RD-M7100 SLX SGS 12 Speed Rear Derailleur

  • Hyperglide+ offers fast and shockless shifting
  • Silent and stable operation in all gears
  • Low-profile design
  • Extra wide range 12-speed drivetrain
  • Decreased rear derailleur and chain tension in low gear

Check Latest Price

Sold By Price
Amazon
eBay
REI
Main Street Cycles

Product Details

Specifications

Details
CAGE LENGTH SGS/Long
TOTAL CAPACITY 41T
MAX FRONT DIFFERENCE 0
NUMBER OF PULLEY TEETH 13
GENERATION M7100

Reviews From Real Customers

Frank
Andrew
Sotex

12. Shimano XT RD-M8000-SGS Rear Derailleur – 11 Speed – Long Cage

Shimano XT RD-M8000-SGS Rear Derailleur - 11 Speed - Long Cage

  • Light Shift Operation With 20% Less Effort
  • Improved chain stability
  • Efficient Shifting And Smoother Driving
  • New Shadow Design With Optimized Slant Angle
  • New Shift Cable With New Hyper Low-Friction Coating Technology

Check Latest Price

Sold By Price
Amazon
eBay
Walmart
Jenson USA

Product Details

Specifications

Details
Cage length Sgs/long,gs/medium
Total capacity 47,39
Max front difference 18,10
Average weight 275 g, 271 g
Tension pulley bearing Sealed bearing

13. Microshift M26 Rear Derailleur – Long Cage (Black)

Microshift M26 Rear Derailleur - Long Cage (Black)

  • Long Cage

Check Latest Price

Sold By Price
Amazon
REI
Performance Bicycle
Bicycle World

Product Details

Specifications

Details
Cage Length Long
Chain Wrap Capacity 45
Derailleur Mount Style 10×1 Standard
Largest Cog 36
Rear Shifter Compatibility Shimano Mountain

Reviews From Real Customers

Chris
Kurt K.
fjoh4160

14. Shimano Deore XT Di2 RD-M8050-GS Rear Derailleur

Shimano Deore XT Di2 RD-M8050-GS Rear Derailleur

  • Accurate and stable shifting in any condition
  • Instant response
  • Customized shift speed within Multi-shift
  • Powerful shifting
  • Seamless gear change even under high load

Check Latest Price

Sold By Price
Amazon
eBay
Walmart – Kyles Bikes
Brands Cycle & Fitness

Product Details

Specifications

Details
Average weight 320g
Cage Length Medium
Cassette Spacing Shimano / SRAM 11
Chain Wrap Capacity 35t
Intended Use Mountain

15. Shimano RD-M8100 XT SGS 12 Speed Rear Derailleur

Shimano RD-M8100 XT SGS 12 Speed Rear Derailleur

  • RD-M8100

Check Latest Price

Sold By Price
Amazon
Thunder Mountain Bikes
Universal Cycles
Spokey Joe’s Bikes & Gear

Product Details

Specifications

Details
CAGE LENGTH SGS/Long
MAX FRONT DIFFERENCE 0
TENSION PULLEY BEARING Sealed Bearing
GUIDE PULLEY BEARING Sealed Bearing
NUMBER OF PULLEY TEETH 13

Reviews From Real Customers

James S.

16. Shimano SLX Dyna-Sys 3×10 Mountain Bicycle Front Derailleur – FD-M671A, White

Shimano SLX Dyna-Sys 3x10 Mountain Bicycle Front Derailleur - FD-M671A, White

  • Side pull cable routing
  • Dyna-Sys 10-speed MTB drivetrain compatibility
  • For 66-69 degree chainstay angle

Check Latest Price

Sold By Price
Amazon
eBay

Product Details

Reviews From Real Customers

Mark
Wayne-o
francihil_29

17. Microshift Mezzo M36 8/9-Speed Rear Derailleur Black Long Cage

Microshift Mezzo M36 8/9-Speed Rear Derailleur Black Long Cage

  • Weight saving aluminum bracket body and outer link
  • Steel pulley cage for extra chain-rub durability
  • Compatible with Shimano 8 and 9-speed mountain and road systems

Check Latest Price

Sold By Price
Amazon
REI
Performance Bicycle
Universal Cycles

Product Details

Specifications

Details
Rear Derailleur Mount Type 10×1 Standard
Drivetrain Speeds 7,8,9
Cage Length Long
Chain Wrap Capacity (teeth) 45teeth
Largest Cog 34

Reviews From Real Customers

Steve D
REI

18. Shimano Dura-Ace RD-R9100 11-Speed Rear Derailleur

Shimano Dura-Ace RD-R9100 11-Speed Rear Derailleur

  • Stable Shifting Performance.
  • Pulley Follow-Up In Certain Distance.
  • Shimano Shadow Rd Construction.
  • Low Profile Rear Derailleur Design.
  • Race Endurance For Less Damage In Crush.

Check Latest Price

Sold By Price
Amazon
Walmart
Jenson USA
Performance Bicycle

Product Details

Specifications

Details
Weight 2 lb

Reviews From Real Customers

Andy
Randy
TBJ

19. SRAM X3 Rear Derailleur – Speed Long Cage Black

SRAM X3 Rear Derailleur - Speed Long Cage Black

  • Material: aluminum
  • Weight: 295 g
  • Speeds: 8/7
  • Max ratio: 36 teeth
  • Compatibility: Exact Actuation Ratio, 9 speeds, 36 teeth maximum

Check Latest Price

Sold By Price
Amazon
Universal Cycles
Stage21 Bikes
Triton Cycles

Product Details

Specifications

Details
Item Package Dimensions L x W x H 6.34 x 5.2 x 3.19 inches
Item Dimensions LxWxH 7 x 4 x 3 inches
Suggested Users Mens
Model Year 2012
Style Rear Derailleur

Reviews From Real Customers

Alexxxx17462
brian_nystrom
bobkacz

20. Shimano RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur

Shimano RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur

  • Fr

Check Latest Price

Sold By Price
Amazon
eBay – backcountry
Jenson USA
Competitive Cyclist

Product Details

Specifications

Details
Size Use with 11-32/11-36 Cassette

Reviews From Real Customers

David
jensonusa.com
Peter

Conclusion

The derailleur is an important part of the mountain bike that helps to keep the chain in place and helps to change gears. The derailleur is a complex piece of machinery that is made up of many different parts, but the most important part of the derailleur is the cage.

The cage helps to guide the chain and keep it in place, and it also helps to change gears. The derailleur is a very important part of the mountain bike and it is important to make sure that it is in good working order.

Categories Uncategorized

Leave a Comment