The best mountain bike derailleur helps you shift quickly, efficiently and silently.

we’ve put together a collection of the best Rear Derailleurs that are currently available on the market. To help you find the perfect Rear Derailleur among a wide variety of options, we constantly update our collection with new and trending models.

10 Best Rear Derailleurs

Based on dozens of customer reviews and ratings, the followings are the top 10 best-selling Rear Derailleurs:

# Preview Product Price
1 Shimano RDM310DL Altus GS 7/8-speed Rear Der Black,Long Cage Shimano RDM310DL Altus GS 7/8-speed Rear Der Black,Long Cage $18.95 View Product
2 SRAM Red eTap AXS Rear Derailleur Black, Max 36T, Long Cage SRAM Red eTap AXS Rear Derailleur Black, Max 36T, Long Cage $724.00 View Product
3 Shimano Acera M360 7 and 8-Speed Rear Derailleur with SmartCage, Black Shimano Acera M360 7 and 8-Speed Rear Derailleur with SmartCage, Black $24.00 View Product
4 SRAM X01 Eagle AXS 12-Speed Rear Derailleur Black, A1, 52T SRAM X01 Eagle AXS 12-Speed Rear Derailleur Black, A1, 52T $510.00 View Product
5 SRAM Red eTap Rear Derailleur One Color/A2, 32T Max SRAM Red eTap Rear Derailleur One Color/A2, 32T Max $662.00 View Product
6 SRAM GX Eagle AXS Rear Derailleur - 12-Speed, Long Cage, 52t Max, Lunar SRAM GX Eagle AXS Rear Derailleur – 12-Speed, Long Cage, 52t Max, Lunar $370.00 View Product
7 MOHEGIA Bike Rear Derailleur RD-TY21B 6/7 Speed Direct Mount for Mountain Bicycle-Black MOHEGIA Bike Rear Derailleur RD-TY21B 6/7 Speed Direct Mount for Mountain Bicycle-Black $20.99 View Product
8 Sram Unisex - Adult XX1 Eagle AXS Rear Derailleur, Black, One Size Sram Unisex – Adult XX1 Eagle AXS Rear Derailleur, Black, One Size $632.75 View Product
9 Shimano Tourney TY300 6/7-Speed Rear Derailleur with Dropout Claw Hanger Shimano Tourney TY300 6/7-Speed Rear Derailleur with Dropout Claw Hanger $12.99 View Product
10 SHIMANO Ultegra Di2 RD-R8050 Rear Derailleur Gray, Long SHIMANO Ultegra Di2 RD-R8050 Rear Derailleur Gray, Long $274.95 View Product

Top Rated Rear Derailleur Reviews

Since we’ve mentioned 10 different models of Rear Derailleurs on the above list, it may be difficult for you to find the right one for your needs. This is why we listed the key features of each of these Rear Derailleurs below:

Sale1

Shimano RDM310DL Altus GS 7/8-speed Rear Der Black,Long Cage
Shimano RDM310DL Altus GS 7/8-speed Rear Der Black,Long Cage

$18.95
View Product
Product Highlights:

  • Chain Wrap Capacity: 43teeth, Derailleur Action: Top-Normal (Traditional)
  • Derailleur Color: black, Drivetrain Spacing: Shimano/SRAM 8, Largest Cog: 34teeth
  • Shifter/Rear Derailleur : Shimano, Speeds: 8sp, Weight: 326g
2

SRAM Red eTap AXS Rear Derailleur Black, Max 36T, Long Cage
SRAM Red eTap AXS Rear Derailleur Black, Max 36T, Long Cage

$724.00
View Product
Product Highlights:

  • SRAM
  • RED eTap AXS Rear Derailleur
  • Rear Derailleur
3

Shimano Acera M360 7 and 8-Speed Rear Derailleur with SmartCage, Black
Shimano Acera M360 7 and 8-Speed Rear Derailleur with SmartCage, Black

$24.00
View Product
Product Highlights:

  • Shimano Acera M360 7
  • 8-Speed Rear Derailleur with SmartCage, Black
4

SRAM X01 Eagle AXS 12-Speed Rear Derailleur Black, A1, 52T
SRAM X01 Eagle AXS 12-Speed Rear Derailleur Black, A1, 52T

$510.00
View Product
Product Highlights:

  • SRAM
  • X01 Eagle AXS Rear Derailleur
  • Rear Derailleur
5

SRAM Red eTap Rear Derailleur One Color/A2, 32T Max
SRAM Red eTap Rear Derailleur One Color/A2, 32T Max

$662.00
View Product
Product Highlights:

  • SRAM
  • RED eTap Rear Derailleur
  • Rear Derailleur
6

SRAM GX Eagle AXS Rear Derailleur - 12-Speed, Long Cage, 52t Max, Lunar
SRAM GX Eagle AXS Rear Derailleur – 12-Speed, Long Cage, 52t Max, Lunar

$370.00
View Product
Product Highlights:

  • SRAM
  • GX Eagle AXS Rear Derailleur
  • Rear Derailleur
7

MOHEGIA Bike Rear Derailleur RD-TY21B 6/7 Speed Direct Mount for Mountain Bicycle-Black
MOHEGIA Bike Rear Derailleur RD-TY21B 6/7 Speed Direct Mount for Mountain Bicycle-Black

$20.99
View Product
Product Highlights:

  • Model：RD-TY21B rear derailleur compatible with 6/7 speed mountain bikes.
  • Note:The rear derailleur is direct mount,not hub bolt mount .Please check the mount type of the original part before ordering.
  • Stability: Durable aluminum alloy material and excellent shifting performance ensure safe and stable riding.
  • Wide application: Rear derailleur is easy to use and maintain.Suitable for MTB,mountain bikes, road bikes, folding bicycles and so on.
  • Important: Please feel free to contact if you have any questions, we will provide quality service.
Sale8

Sram Unisex - Adult XX1 Eagle AXS Rear Derailleur, Black, One Size
Sram Unisex – Adult XX1 Eagle AXS Rear Derailleur, Black, One Size

$632.75
View Product
Product Highlights:

  • Technical data:
  • Use: MTB
  • Installation: direct mounting
  • System compatibility: 12-speed
  • Design: long cage
Sale9

Shimano Tourney TY300 6/7-Speed Rear Derailleur with Dropout Claw Hanger
Shimano Tourney TY300 6/7-Speed Rear Derailleur with Dropout Claw Hanger

$12.99
View Product
Product Highlights:

  • Includes frame hanger
  • Largest Cog: 34
  • Chain Wrap Capacity: 43
  • Cage Length: Long
  • keyword search: Replaces rd8162
10

SHIMANO Ultegra Di2 RD-R8050 Rear Derailleur Gray, Long
SHIMANO Ultegra Di2 RD-R8050 Rear Derailleur Gray, Long

$274.95
View Product
Product Highlights:

  • Material: aluminum
  • Cage Length: [SS] short, [GS] medium
  • Capacity: [SS] 33T, [GS] 37T
  • Cassette Range: [SS] 11-30T, [GS] 11-34T
  • Gearing: 2×11

Video Overview

How to Adjust a Rear Derailleur – Limit Screws & Indexing

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How to fix the shifting on your bike. The majority of rear shifting problems can be solved with basic adjustments to the limit screws and index setting of the rear …

Final Words

So, these are all of the Best Rear Derailleurs available on the market. We hope this collection was helpful to find the right Rear Derailleur for the money. However, we recommend checking out the features, benefits, and problems of each of these Rear Derailleurs before taking your decision.