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Best Bike Rear Derailleurs - Buying Guide

Last Updated: 09/18/2019

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  #1

microSHIFT Advent Rear Derailleur - 9 Speed, Medium Cage, Black, with Clutch

 Ean: 0657993183762   |    PartNumber: RD-M6195M   |   Asin: B07P9347VG

Designed with the rider in mind, the Advent rear derailleur packs trail-ready features into an attainable wide range drivetrain system. The derailleur kinematics are precisely tuned to use a more direct cable patch, making the shifting feel consistent across the lowest and highest gears, and everything in between.

Features:



Clutch provides stronger chain management over rough terrain
Ratchet-and-pawl clutch is easily adjustable and repairable
Direct path cable routing for smooth, responsive shifting
Compatible with 11-42T 9-speed cassettes
Compatible with Advent shifters only




Specifications:

Speed: 1x9

Cage Length: Medium

Largest Cog:42T
Chain Capacity:41T



Features

Brand: microSHIFT   |   Manufacturer: microSHIFT

Item Dimensions: 3.11 x 5.51 x 7.19 inches (7.9 x 14.0 x 18.3 cm)   |   Package Dimensions: 3.11 x 5.51 x 7.19 inches (7.9 x 14.0 x 18.3 cm)

Amazon Price: $54.98 | as of 09/18/2019(9:36am pst)
Availibility: Usually ships in 24 hours
List Price: $54.98

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  #2

Flex Derailleur Hanger 94 for GT,Aggressor, Avalanche, KHS, Timberline, Kestrel, Kettler, Mongoose

Model: 2B40   |    Mpn: 2B40   |    Ean: 6931905005385   |    PartNumber: 2B40   |   Asin: B01LWC9Y8Y

AIRBORNE Delta CX-Goblin /GT Aggressor 1.0 / 2.0 / 3.0 - 2013 Avalanche-2008-2013 Avalanche 1.0 - 2006-2008 Avalanche 1.0 Disc - 2006-2007 Avalanche 1.0 Disc/2.0 Disc - 2008 Avalanche 1.0 Disc/2.0 Disc/Women - 2008 Avalanche 1.0, Expert, Pro - 2006 Avalanche 2.0 - 2007-2008 Avalanche 2.0 Disc - 2007 Avalanche 3.0 - 2008 Avalanche 3.0 Disc - 2008 Avalanche 3.0, 1.0 disc, 2.0 disc, 3.0 disc - 2010 Avalanche Expert - 2007-2008 Avalanche Expert/Women - 2008 Avalanche Pro - 2006-2008 Expert - 2010 Hans Rey Trials Frame - 2008 I Drive 1.0, 2.0 - 2006 I Drive 4 - 2007 IDXC 1.0, 2.0,3.0,4.0 - 2006 Karakoram - 2011-2013 Lopes Zaskar - 2007 Marathon - 2009 Marathon 1, 2 - 2008 Marathon 1.0, 2.0, 3.0 - 2007 Marathon 1.0, 2.0, 3.0, 29er - 2008 Marathon Carbon - 2009-2010 Marathon Carbon Pro & Team - 2010 Marathon Carbon Team, Pro - 2007-2008 Marathon GTw 2.0, 3.0 - 2008 Nomad - 2008-2012 Nomad 26 inch & 700C - 2013 Nomad LTD Ladies - 2008 Nomad LTD Men - 2008 Nomad Series - 2008-2013 Nomad Sport - 2008 Nomad Ultra - 2008 Nomad/Nomad Sport Ladies - 2008 Nomad/Nomad Sport Men - 2008 NomadSport/ LTD - 2007 Sensor - 2010-2013 Sensor 1.0, 2.0, 3.0 - 2010 Timberline - 2007-2009 Timberline/Timberline Sport - 2008 Timberline/Timberline Sport(Men) - 2007-2008 Timberline/Timberline Sport(Women) - 2007-2008 Transeo - 2010 Zaskar - 2006 Zaskar - 2008-2012 Zaskar 9r, Expert, Pro - 2010 Zaskar Carbon - 2009-2010 Zaskar Expert - 2006-2008 Zaskar Expert GTw - 2008 Zaskar Expert, Pro - 2007 Zaskar Niner Elite - 2012 Zaskar Niner Expert - 2012 Zaskar Niner Expert, Niner Pro - 2011 Zaskar Niner Pro - 2012 Zaskar Pro - 2006-2008 Zaskar Series - 2010 Zaskar Team - 2006-2008 Zum - 2006 ZUM 1.0, 2.0, 3.0, 4.0 - 2006-2007/KESTREL Yuma - 2012-2014/KETTLER SixFifty 700 - 2014/KHS Aguilla - 2012-2014 Alite 1000 - 2012-2013 Alite 2000 - 2012-2013 Alite 24 - 2013-2014 Alite 300 - 2014 Alite 350 - 2012-2014 Alite 500 - 2012-2014 Tempe - 2012-2014 Tucson - 2012-2014 Winslow - 2013-2014/MONGOOSE Argus

Features

  • Derailleur Hanger 94
  • Comes with Bolt
  • Silver Color, One Derailleur Hanger
  • Please check below for compatibility list
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Brand: Flex   |   Manufacturer: Flex

Item Dimensions: 7.87 x 7.87 x 7.87 inches (20.0 x 20.0 x 20.0 cm)   |   Package Dimensions: 0.39 x 3.23 x 5.04 inches (1.0 x 8.2 x 12.8 cm)

Amazon Price: $13.99 | as of 09/18/2019(9:36am pst)
Availibility:
List Price: $13.99

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  #3

Stylrtop Bike Bicycle Rear Derailleur Guard Rack Protector

 Ean: 0713965798539   |    PartNumber: CT-BG-003   |   Asin: B07JZFDTPH

Features

  • Application:Provide effective protection for rear derailleur, prevent the derailleur was struck distorti on or displacement in riding;
  • Size:115 X 54 X40 mm
  • Easy to installed:Just be fixed in the corresponding hole position;
  • Made of strong steel,very durable,suitable for most mountain bikes, road bikes, folding bicycles, racing bikes
  • The Bicycle Rear Derailleur Protector is built to last.We stand behind our product and provide lifetime warranty.If you do not like it just return and we will full refund for you.no question ask.
  • See more on Amazon...

Brand: Stylrtop   |   Manufacturer: Stylrtop

Package Dimensions: 1.85 x 3.9 x 5.35 inches (4.7 x 9.9 x 13.6 cm)

Amazon Price: $7.89 | as of 09/18/2019(9:36am pst)
Availibility: Usually ships in 24 hours
List Price: $12.00

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  #4

SRAM GX Eagle 12-Speed Rear Derailleur

Model: SRAM   |    Mpn: 50-5261   |    PartNumber: 50-5261   |   Asin: B074JHX4VK

SRAM's GX Eagle line is designed to save weight, be more efficient and provide optimal longevity for drivetrain components. The GX Eagle Rear Derailleur can accommodate SRAM's 10-50T cassette, for an effortless pedaling feel. The Type-3 Roller Bearing Clutch delivers a smoother torque curve for a quieter and more consistent operation and feel and Cage Lock has also been added further back in the derailleur to protect it from trail debris. This new robust mounting system furthers the innovation of the Eagle derailleur's performance and overall durability.Features: Cage Lock is faster and simpler Roller Bearing Clutch delivers maximum drivetrain stability X-Actuation keeps shifting sharp and consistent across the entire cassette X-Horizon limits all movement to the horizontal axis, making ghost shifting impossible while also reducing shift force

Features

  • Cage Lock is faster and simpler
  • Roller Bearing Clutch delivers maximum drivetrain stability
  • X-Actuation keeps shifting sharp and consistent across the entire cassette
  • X-Horizon limits all movement to the horizontal axis, making ghost shifting impossible while also reducing shift force
  • See more on Amazon...

Brand: SRAM   |   Manufacturer: Sram

Item Dimensions: 4 x 8 x 9 inches (10.2 x 20.3 x 22.9 cm)   |   Package Dimensions: 4 x 8 x 9 inches (10.2 x 20.3 x 22.9 cm)

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  #5

SHIMANO Deore Mountain Bicycle Rear Derailleur - RD-M6000

Asin: B072TZ6S3G

High-efficiency drivetrain for aggressive trail riding Optimized gear combinations and ratios for trail riding Compatible with wide range cassette Silent and stable for technical trail riding Improved stability and chain retention longevity SHIMANO SHADOW RD+ Light shifting effort OPTISLICK cable Smooth and precise shifting DYNA-SYS compatible system

Features

Brand: SHIMANO   |   Manufacturer: Shimano Cycling

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  #6

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

 PartNumber: JKSPORTSPJ1007   |   Asin: B07PP31GBQ

Features

Brand: JKSPORTS   |   Manufacturer: SHIMANO JKSPORTS

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  #7

JKSPORTS Shimano Altus Mountain Bike Rear Derailleur - Direct Mount - RDM310

 PartNumber: JKSPORTSPJ1002   |   Asin: B07PP2KN1L

Wide link design increases durability and precise shifting. 7/8 speed design. 13t guide pulley and 15t tension pulley for long wear. Max sprocket: 34t. Top-Normal (standard action) return spring.

Features

  • metal
  • 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
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Brand: JKSPORTS   |   Manufacturer: SHIMANO JKSPORTS

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  #8

SHIMANO Ultegra R8000 Mid-Cage Rear Derailleur

Model: Shimano   |    Mpn: 50-5203   |    PartNumber: 50-5203   |   Asin: B072N6HF31

Thanks to Shimano's penchant for trickle-down technology, you can get Dura-Ace functionality at a more attractive price point. As long as you don't mind the slight weight differential you can count on Ultegra to serve up shifts that are every bit as clean, smooth and precise as those Dura-Ace delivers. For 2017, Shimano uses their shadow design, for a thinner assembly construction to offer a more streamlined, integrated fit. The pulley maintains consistent distance to the cassette for increased shift stability, and is compatible with a cassette up to 11-30T.Features: Stable Shifting Performance Shimano Shadow Construction Low profile rear design Uses a 11-30T cassette

Features

  • Stable Shifting Performance
  • Shimano Shadow Construction
  • Low profile rear design
  • Uses a 11-30T cassette
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Brand: SHIMANO   |   Manufacturer: Shimano

Item Dimensions: 4 x 5 x 7 inches (10.2 x 12.7 x 17.8 cm)   |   Package Dimensions: 4 x 5 x 7 inches (10.2 x 12.7 x 17.8 cm)

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  #9

Juscycling Derailleur Hanger for TREK remedy, liquid, navigator, GARY FISHER 6, Black

 Ean: 0716955996670   |    PartNumber: 4347457638   |   Asin: B07BJ8Q37P

Fits to below Brand/Model. (Please check the original hanger to make sure you are buying the correct part)

TREK, GARY FISHER, KLEIN: For Most mountain bikes from 1998 2013 TREK - 29er X-caliber, Cobia, Cali SL, Cali S, Cali, Mamba, Marlin, Wahoo, 3700 disc, 3500 disc, 3500, Skye SL disc, Skye SL, Skye S, Skye, Police, MT 240, , MT 60 Boy's, MT 60 Girl's 2012 TREK - X-CALIBER, COBIA, MAMBA, MARLIN, SUPERFLY AT ELITE, , 8.4 DUAL SPORT, 8.5 DUAL SPORT, NEKO S, NEKO SL, LEXA SL 2010 - TREK 3900 disc, 3900, 3700, 3500, Skye S, Skye, Portland, Allant, Allant wsd, Valencia +, Valencia, PDX, 7100, 3 series, 7.3-7.7 FX, Navigator 2.0 2010 Gary Fisher Superfly, Wahoo, Marlin, Hi Fi, Big Sur - TREK 69er 3x9, Elite 9.9 SSL, Elite 9.8, Elite 9.7, 8500, 8000, 6700, 6700 wsd, 6500, 6500 wsd, 6000, 4500, 4500 wsd 2007 TREK 6000 SLR alpha, Remedy, Navigator 2006 - TREK Fuel ex 9.0 2003-2005 4100 MTN, 8000 MTN, Fuel 90 MTN, Liquid MTN, Y-Glide 2002-2005 Fisher MTN all models 2003 Alpha series, Multitrack series, Navigator series 2001 STP 400 Y bike frames Klein attitude SCHWINN: 2000- Super Sport, Super Sport GL


Features

  • fit many frames of TREK GARY FISHER as described
  • come with bolts
  • fast shipment by Amazon
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Brand: Juscycling   |   Manufacturer: Juscycling

Package Dimensions: 0.28 x 2.68 x 4.96 inches (0.7 x 6.8 x 12.6 cm)

Amazon Price: $11.98 | as of 09/18/2019(9:36am pst)
Availibility: Usually ships in 24 hours
List Price: $11.98

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  #10

SRAM X01 Eagle 12-Speed Rear Derailleur

Model: SRAM   |   Asin: B01HQE434Q

In the never ending conundrum of one-by gearing choices, we've spent many a day opting for ten-tooth speed only to end up grinding over merciless grades and wishing that an extra climbing gear could somehow fly out of the sky and save us in our time of knee-breaking need. With a massive gear range across 12 cogs, SRAM's Eagle drivetrain swoops in to save the day and provide nearly the range of a two-by system in a simple one-by setup. The SRAM X01 Eagle 12-Speed Rear Derailleur ties the system together, driving precise gear changes across the entire cassette with a titanium spring and durable, forged aluminum body. Similar to SRAM's 11-speed offerings, this little derailleur borrows a boatload of technology from its flagship XX1 sibling to create a budget-friendly, clean-shifting ride experience. The Roller Bearing Clutch, long revered for its nearly unbeatable chain stabilization, gets an update with a repositioned upper pulley and larger lower pulley to accommodate the extra chain length needed to run such a wide range of cogs. Paired with a strengthened clutch, it efficiently manages chain tension to eliminate derailleur bounce and chain slap for a solid, noise-free ride. The X-Horizon feature further boosts this stability by limiting the derailleur's shifting movement across the horizontal axis, with its large upper pulley design maintaining a constant chain gap across the cassette. This effectively reduces shift initiation force and eliminates pesky ghost shifting, so you'll drop into the right gear with minimal effort the second you want it. Last, but by far not the least, is SRAM's Exact Actuation technology addresses the issue of different gears requiring different amounts of cable pull to shift, which leads to loud cassettes and inefficient shifting. With Exact Actuation, each gear shift requires the same amount of cable pull, resulting in a predictable click and shift no matter where the chain sits in the cassette. This also means an overall quieter,...

Features

  • Material: forged aluminum, [spring] titanium
  • Cage Length: Eagle
  • Gearing: 10 - 50 t
  • Pull Type: X-Actuation
  • Recommended Use: mountain bike
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Brand: SRAM   |   Manufacturer: SRAM

Item Dimensions: 4 x 8 x 8 inches (10.2 x 20.3 x 20.3 cm)   |   Package Dimensions: 4 x 8 x 8 inches (10.2 x 20.3 x 20.3 cm)

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  #11

SHIMANO XT RD-M8100-SGS RD-M8120-SGS Rear Derailleur - 12-Speed, Long Cage, Black

Model: Shimano   |   Asin: B07VBQH9ZY

The Shimano Deore XT RD-M8100/M8120 rear derailleur is designed to provide smooth and stable shifting for 12-speed MTB drivetrains.

Offers fast and shockless shifting The low-profile design includes a bumper added to the derailleur pulley cage Shimano Shadow RD+ technology reduces chain slap and creates a quieter drivetrain Includes large 13t pulley Long cage is designed to be used with 2x12 drivetrain systems

Features

  • The Shimano Deore XT RD-M8100/M8120 rear derailleur is designed to provide smooth and stable shifting for 12-speed MTB drivetrains.
  • Offers fast and shockless shifting. The low-profile design includes a bumper added to the derailleur pulley cage
  • Shimano Shadow RD+ technology reduces chain slap and creates a quieter drivetrain
  • Includes large 13t pulley
  • See more on Amazon...

Brand: SHIMANO   |   Manufacturer: SHIMANO

Item Dimensions: 5 x 7 x 7 inches (12.7 x 17.8 x 17.8 cm)   |   Package Dimensions: 5 x 7 x 7 inches (12.7 x 17.8 x 17.8 cm)

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  #12

SRAM XX1 Eagle AXS Upgrade Kit - Rear Derailleur, Battery, Eagle AXS Controller w/Clamp, Charger/Cord

 Ean: 0710845826108   |    PartNumber: 00.7918.082.000   |   Asin: B07T8CCR3W

The SRAM XX1 Eagle AXS Upgrade kit includes all of the electronic shifting components needed to introduce customizable AXS technology to your Eagle drivetrain.

Features

  • Includes the SRAM XX1 Eagle AXS rear derailleur with battery, Eagle controller with clamp, and charger and cord
  • The XX1 Eagle rear derailleur provides instantaneous shifting from a single touch, even under the heaviest of loads, and eatures a shorter cage that allows for 10mm more ground clearance and more chain wrap on the cassette
  • The Eagle AXS controller offers a unique wireless shifting experience with ergonomic touchpoints that are customizable to your preferences - you can choose what each button does through the AXS App
  • See more on Amazon...

Brand: SRAM   |   Manufacturer: SRAM

Item Dimensions: 5.03 x 9.47 x 17.51 inches (12.8 x 24.1 x 44.5 cm)   |   Package Dimensions: 5 x 9 x 17 inches (12.7 x 22.9 x 43.2 cm)

Amazon Price: $1,000.00 | as of 09/18/2019(9:36am pst)
Availibility: Usually ships in 24 hours
List Price: $1,000.00

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  #13

SHIMANO 105 RD-R7000 Rear Derailleur

Model: Shimano   |    Mpn: IRDR7000   |    PartNumber: IRDR7000   |   Asin: B07G3D4NS9

105 RD-R7000 Rear Derailleur

Features

  • Material: alloy
  • Cage Length: long
  • Capacity: [long] 39t
  • Cassette Range: [long] 11-28t through 11-34t
  • Compatibility: Shimano 105 R7000, Shimano Ultegra R8000, Shimano Dura-Ace R9100
  • See more on Amazon...

Brand: SHIMANO   |   Manufacturer: Shimano

Item Dimensions: 4 x 5 x 7 inches (10.2 x 12.7 x 17.8 cm)   |   Package Dimensions: 4 x 5 x 7 inches (10.2 x 12.7 x 17.8 cm)

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  #14

Shimano Alivio RD-M410 Rear Derailleur 7/8-Speed SGS Long Cage Direct Mount Black

 Ean: 0711717897660   |    PartNumber: 43224-16297   |   Asin: B017ONKJ5Q

* Model: RD-M410.
* Mount Type: Direct Attachment.
* Drivetrain Spacing: Shimano/SRAM 8.
* Advanced light-action design, Teflon-coated bushings, Elegant and fashion.
* SGS long cage design offers a wider gear range.
* Comes with instruction manual.
* Weight: about 310g.
NOTE: This is a direct mount, if your frame with hook, you can use it.

Cycling is the most popular way to travel, exercising, environmental protection, safety, no traffic jam and so on.
The bicycle parts are important, Shimano brand will brings you the unusual experience.

"The seller88" warranty:
100% genuine Shimano, 100% new, no Shimano package.
Any question when you receive the item or in using, please feel free to contact us, we are always here to help you.

Q: Is its body made of metal, or is it plastic?

A: The pivot and mechanism is made of aluminum, the cage is stamped steel, with reinforced plastic housing.

Features

  • Aluminum and steel construction for lightweight strength
  • Compatibility: 7/8 speed rear derailleurs
  • Largest Cog: 34T, Total capacity: 43T, Min/Max: 11/34T
  • Derailleur Action: Top-Normal (Traditional), Cage Length: Long cage
  • Shimano Alivio derailleur apart from other rear derailleurs is the full-metal construction and Teflon coated bushings, allows your bike to take on even the roughest trails
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Brand: YAD   |   Manufacturer: YAD

Package Dimensions: 2.01 x 4.02 x 5.98 inches (5.1 x 10.2 x 15.2 cm)

Amazon Price: $30.58 | as of 09/18/2019(9:36am pst)
Availibility: Usually ships in 1-2 business days
List Price: $30.58

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  #15

SHIMANO SLX RD-M7100 Rear Derailleur

Model: Shimano   |   Asin: B07WPGBGFN

SLX drivetrains seem to be an afterthought. We get it -- XT and XTR are flashy and featherweight, but when it comes to workhorse components, SLX is damn near impossible to beat. Thankfully, it also comes along with trickle-down technology from its pricier siblings, and it's easy to see with the new SLX RD-M7100 Rear Derailleur that's optimized with 12-speed technology, crisp shifting, and sleek graphics that elevate standards far above what we think of when we talk about mid-range groupsets. It comes ready to take on the big-guns, with a 51-tooth capacity (a whopping 10 extra teeth above the previous version), and the flexibility to run both of Shimano's 12-speed cassette offerings. The new SLX rear derailleur features a larger, 13-tooth pully wheel for an increase in efficiency and chain management while you're riding. This partners up with advance shifting performance to deliver decreased tension when you're in the big rings. More changes happened to the pulley cage, with an added bumper that protects your pulley wheel from impacts with rocks and branches -- an appreciated feature with the extra length that the derailleur hosts in order to accommodate all 12 cogs. The derailleur is built to accommodate both of Shimano's new 12-speed cassettes, the 10-51t, or 10-45t cassttes, so you can find the right gearing for your ride, regardless of you're charging full-speed through smooth ribbons of single track, or crunching up steep, seemingly endless fire roads on sky-high enduro climbs. One thing that we're thankful has stayed the same through the generations is the stabilizer switch that we saw trickling down from XT and XTR in the previous model. When engaged, this switch helps to eliminate chain slap and dropped chains by increasing spring tension. This is a valuable option for suspension systems that require chainstays and pivots located close to the rear derailleur. The RD M7100 keeps a good thing going with some of the previous model's improvements, including th...

Features

  • Material: aluminum
  • Pull Type: mechanical
  • Cage Length: long
  • Cassette Range: 10 - 51t
  • Gearing: 1 x 12
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Brand: SHIMANO   |   Manufacturer: Shimano

Item Dimensions: 4 x 5 x 8 inches (10.2 x 12.7 x 20.3 cm)   |   Package Dimensions: 4 x 5 x 8 inches (10.2 x 12.7 x 20.3 cm)

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  #16

KCNC Road Cyclocross Bicycle Bike Rear Derailleur Oversized Pulley Wheel System Cage OSPW for Shimano Dura-Ace/Ultegra 6700/6800/6870/7800/7900/7970/9000/9070 use in Black/Red/Gold Pulley Colors

 PartNumber: KCNC OSPW kit for shimano dura ace   |   Asin: B074DF1TP4

KCNC Road Bike Derailleur Pulley Wheel Kit for Shimano Dura Ace/Ultegra
The system consists of Top 14t & Bottom 16t alloy pulley wheels fitted with low friction bearings and a lightweight cage made from 7075 Alloy .
The Oversized Pully Wheel SYS system reduces friction in the pulleys by 45 % and for your optimised performance.
The system is compatible with Shimano Ultegra/Dura Ace 10s and 11s, electronic and mechanical rear derailleur .
Top Pully :14T
Bottom Pully :16T Matiral : 7075 Alloy
Weight : approx.57 grams
For Road Shimano Ultegra/Dura Ace 6700/6800/7800/7900/7970/9000/9070 use

Features

  • The Oversized Pully Wheel System reduces friction in the pulleys by 45 % and for your optimised performance.
  • Top 14t & Bottom 16t alloy pulley with AL7075 CNC Cage
  • Stainless Steel Durable Bearing
  • For Road Shimano Ultegra/Dura Ace 6700/6800/7800/7900/7970/9000/9070 use
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Brand: KCNC   |   Manufacturer: KCNC

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  #17

AUTUT 2 Pcs Universal Derailleur Hanger for Cyclocross Bike,Hybrid Bike, Mountain Bike, Road Racing Bike

 Ean: 0799637837850   |    PartNumber: CS202390   |   Asin: B07RGPJ72N

Universal fit for most of bike, cyclocrossbike, hybrid bike, mountain bike, road racing bike, etc.
The upper end of the tail hook is connected with the frame, and the lower end is connected with the rear dial of the transmission.

Features

  • Package Content:2 x Bike Derailleur Hanger, Some Installation Parts
  • Dimension:69 x 34 x 8mm/2.72 x 1.34 x 0.31(L*W*H);Thread Diameter:9mm/0.35
  • Made of aluminum alloy material, durable, firm, sturdy and corrosion resistance.
  • Universal fit for most of bike, cyclocrossbike, hybrid bike, mountain bike, road racing bike, etc.
  • The upper end of the tail hook is connected with the frame, and the lower end is connected with the rear dial of the transmission.
  • See more on Amazon...

Brand: AUTUT   |   Manufacturer: AUTUT

Package Dimensions: 0.5 x 1.5 x 3 inches (1.3 x 3.8 x 7.6 cm)

Amazon Price: $6.99 | as of 09/18/2019(9:36am pst)
Availibility: Usually ships in 24 hours
List Price: $6.99

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  #18

SHIMANO GRX RD-RX812 Rear Derailleur

Model: Shimano   |   Asin: B07WDDSYLS

If you've dabbled in gravel racing and riding, chances are you already know how important a large gear range and tidy setup is, and if you have yet to experience it first hand, we can assure you, that we covet simple drivetrains with few opportunities for failure, and as many gears as possible to get us up poorly-graded hills that make up the Crusher and Kanza. With that said, it took quite some time for component manufacturers to jump on the gravel bandwagon, but with the Kanza's starting line amplifying from sub-50 cyclists to over 3,000 in just twelve years, its a welcome sight to see Shimano launch its GRX gravel-specific groupset that finds the perfect balance between MTB and Road, with a sleek and streamlined drop-bar setup, and improved modulation and bump compliance to handle off-road conditions. Shimano's GRX RD-RX812 follows in the footsteps of Ultegra RX which was launched last year, which took queues from the Shadow mountain bike derailleur, adding in a clutch mechanism to reduce chain slap and dropped chains for a quieter and more secure ride both on and off-road. When in the on position, the clutch increases the spring force to provide crisp shifting and zero chain slap and is easily flipped off for wheel changes. What we find to be big news is that Shimano crafts the GRX RD-RX810 for both 1x and 2x setups, stepping outside of the 2x only comfort zone that the brand had held to, with this short-cage model being optimized for an 11 - 34t cassette. Following in the footsteps of the revamped Dura-Ace and Ultegra groups, this GRX derailleur gets its Shadow cage treatment placing it closer to the frame and under the cassette keeping it out of harm's way and less likely to take the brunt of a driveside crash. This also allows the derailleur to move in a much more linear path allowing for shorter throws with less effort. The RX812 model comes in one cage length, long, which accommodates an 11-42t cassette allowing for a wide range gear ratio when paired w...

Features

  • Material: alloy
  • Cage Length: long
  • Capacity: 31t
  • Cassette Range: [maximum] 11 - 42t, [minimum] 11 - 40t
  • Gearing: 1x11, 2x11
  • See more on Amazon...

Brand: SHIMANO   |   Manufacturer: Shimano

Item Dimensions: 5 x 7 x 7 inches (12.7 x 17.8 x 17.8 cm)   |   Package Dimensions: 5 x 7 x 7 inches (12.7 x 17.8 x 17.8 cm)

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  #19

SHIMANO GRX RD-RX810 Rear Derailleur

Model: Shimano   |   Asin: B07WHN7WWJ

Following the trends in the bike industry, its not all that surprising that groupsets are taking to the gravel, and we appreciate the careful attention and time that Shimano took in designing the GRX RD-RX810 Rear Derailleur for powering through variable conditions on a drop-bar bike. If you've been following Shimano in the all-road and off-road scene, the derailleur won't look shocking to you. In fact, it's nearly identical to the RX version of the Ultegra derailleur that was launched just last year, which took queues from the Shadow mountain bike derailleur, adding in a clutch mechanism to reduce chain slap and dropped chains for a quieter and more secure ride both on and off-road. When in the on position, the clutch increases the spring force to provide crisp shifting and zero chain slap and is easily flipped off for wheel changes. What we find to be big news is that Shimano crafts the GRX RD-RX810 for both 1x and 2x setups, stepping outside of the 2x only comfort zone that the brand had held to, with this short-cage model being optimized for an 11 - 34t cassette. Following in the footsteps of the revamped Dura-Ace and Ultegra groups, this GRX derailleur gets its Shadow cage treatment placing it closer to the frame and under the cassette keeping it out of harm's way and less likely to take the brunt of a driveside crash. This also allows the derailleur to move in a much more linear path allowing for shorter throws with less effort. The RX810 model comes in one cage length, short, which accommodates an 11-34t cassette allowing for a wide range gear ratio when paired with a double without the usual huge jumps between the cogs like on a 1x setup. Sticking to what the brand's customers know well, Shimano continues to use the Dura-Ace, Ultegra, and Tiagra designation with the GRX line, with this particular model falling under the Ultegra umbrella, which means it gets the usual materials and finishes that we expect from a groupset that's just one step from the top...

Features

  • Material: alloy
  • Cage Length: medium
  • Capacity: 38t
  • Cassette Range: [maximum] 11-34t, [minimum] 11-30t
  • Gearing: 1x11, 2x11
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Brand: SHIMANO   |   Manufacturer: Shimano

Item Dimensions: 5 x 7 x 7 inches (12.7 x 17.8 x 17.8 cm)   |   Package Dimensions: 5 x 7 x 7 inches (12.7 x 17.8 x 17.8 cm)

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  #20

SRAM X01 Eagle AXS Upgrade Kit

Model: SRAM   |   Asin: B07WNY75FW

If your bike is already equipped with a SRAM Eagle drivetrain, the X01 Eagle AXS Upgrade Kit allows you to make the switch to wireless electronic shifting without needing to buy the entire AXS groupset. The kit includes the XO1 Eagle AXS derailleur with battery, the Eagle AXS shifter (SRAM calls it the Controller), and a battery charger with charging cable. These components are all you need to make the switch, which means you can continue using your existing Eagle cranks, cassette, and chain to save yourself a bit of extra cash on the upgrade. If you're reading this then you're probably debating why you should make the switch to electronic shifting. Doesn't that make my bike more complex and harder to maintain' The truth is, it's actually the opposite. AXS shifting removes the hassle of routing cables and housing through the frame, and you'll never have to worry about cable stretch or wear. This means crisp, responsive, consistent shifting that rarely needs any adjustments. You'll also enjoy a cleaner cockpit thanks to one less cable, and you can customize the buttons on the shifter to do exactly what you want. Setup is as simple as mounting the derailleur and setting limit screws, installing the shifter, and then powering on the system and pairing the two. If you're concerned about the durability of the Eagle XO1 AXS system, don't be. Compared to mechanical Eagle groupsets, the Eagle AXS derailleur has been contoured around the frame design a bit more. This translates to increased chain wrap, which improves both load distribution and durability, reducing wear and tear on your chain and cassette for better longevity of components. Dually, this new positioning offers a whole 10-millimeters of increased clearance over mechanical Eagle rear derailleurs, meaning your less likely to bash it on a rock or encroaching root. If you do smack your derailleur against something, there's a special Overload clutch that disengages the motor in the event of an impact, allowi...

Features

  • Rear Derailleur: XO1 Eagle AXS with battery
  • Shifters: XO1 Eagle AXS Controller with clamp
  • Cables / Housing: battery charger with cord
  • Recommended Use: enduro, trail
  • Manufacturer Warranty: 2 years
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Brand: SRAM   |   Manufacturer: SRAM

Item Dimensions: 4 x 8 x 16 inches (10.2 x 20.3 x 40.6 cm)   |   Package Dimensions: 4 x 8 x 16 inches (10.2 x 20.3 x 40.6 cm)

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  #21

Bnineteenteam Mountain Bike Rear Derailleur Guard Bicycle Rear Derailleur Protector for Cycling Accessories

 Ean: 0708223022099   |    PartNumber: nxem71aczf   |   Asin: B07TLBC44J

Features:
Made of high quality steel, anti-rust and durable. Arch angle design, making the protector not easy to deform under strong impact force. The shape conforms to most mountain bike, provides effective protection for the rear derailleur, prevent derailment. A single fixed hole can be easily installed. Universal size is suitable for most MTB bicycles, road bikes, folding bikes.

Specification:
Material: Metal
Color: Black
Quantity: 1 pcs
Size: Approx. 12 * 5.5 * 5cm / 4.7 * 2.2 * 2.0in
Weight: Approx. 72g

Package list:
1 x Protective Guard for Bike Derailleur

Features

  • APPLICATION:Provide effective protection for rear derailleur, prevent the derailleur was struck distorti on or displacement in riding;Can also be used protect rear derailleur when tripped,is very reliable.
  • ANTI-RUST:Rear Derailleur Guard is made of high quality steel, anti-rust and durable.
  • SPECIAL DESIGN:Arch angle design, making the protector not easy to deform under strong impact force.
  • EASY TO INSTALL:Single fixed hole can be easily installed.Just be fixed in the corresponding hole position.
  • UNIVERSAL SIZE:The shape conforms to most mountain bike, road bikes, folding bikes,provides effective protection for the rear derailleur, prevent derailment.
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Brand: Bnineteenteam   |   Manufacturer: Bnineteenteam

Item Dimensions: 1.97 x 2.17 x 4.72 inches (5.0 x 5.5 x 12.0 cm)   |   Package Dimensions: 3.94 x 3.94 x 3.94 inches (10.0 x 10.0 x 10.0 cm)

Amazon Price: $7.55 | as of 09/18/2019(9:36am pst)
Availibility: Usually ships in 24 hours
List Price: $7.88

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  #22

AUTUT 2pcs Universal Bicycle Bike Derailleur Hanger Frame Gear Tail Hook, Silver Tone

 Ean: 0799637839052   |    PartNumber: CS202558   |   Asin: B07VDCYDLV

Product Specification
Product Name: Bicycle Derailleur Hanger
Material: Metal
Color: Silver Tone
Dimension: 60 x 38 x 8mm / 2.36" x 1.5" x 0.31" (L*W*H)
Shell Color: Silver Tone
Thread Dia.: 9mm / 0.35"
Hole Dia.: 3mm / 0.12"
Package Content: 2 x Bicycle Derailleur Hanger (with screws)

Features

  • Universal, fit for most of bike, cyclocross bike, hybrid bike, mountain bike, road racing bike,
  • The upper end of the tail hook is connected with the frame, and the lower end is connected with the rear dial of the transmission.
  • Play to protect the transmission after dialing role.
  • Dimension: 60 x 38 x 8mm / 2.36 x 1.5 x 0.31(L*W*H); Thread Diameter: 9mm/0.35
  • Package Include: 2 x Bicycle Bike Derailleur Hanger (with some installation accessories)
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Brand: AUTUT   |   Manufacturer: AUTUT

Package Dimensions: 0.47 x 1.85 x 2.68 inches (1.2 x 4.7 x 6.8 cm)

Amazon Price: $7.89 | as of 09/18/2019(9:36am pst)
Availibility: Usually ships in 24 hours
List Price: $7.89

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  #23

SHIMANO RD 5701 105 30T Max Rear Derailleur, Black, Medium Cage (Renewed)

 Ean: 0683193855727   |    PartNumber: IRD5701GSL-cr   |   Asin: B07XHMYMT2

Features

  • Capable of handling up to a 30t maximum cassette size
  • Extra stiff for crisp, durable shifting
  • Sealed bearing tension pulley
  • Compatible with 10 speed Shimano drivetrains
  • Shimano Reference Number: RD 5700A
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Brand: SHIMANO   |   Manufacturer: Shimano

Item Dimensions: 3.75 x 4 x 6.5 inches (9.5 x 10.2 x 16.5 cm)   |   Package Dimensions: 3.7 x 4.8 x 7.4 inches (9.4 x 12.2 x 18.8 cm)

Warranty: 90 days limited warranty

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  #24

SRAM XX1 Eagle AXS 12-Speed Rear Derailleur

Model: SRAM   |   Asin: B07W375TXG

More than just a mechanical derailleur with a battery and a motor bolted on, the XX1 Eagle AXS 12-Speed Rear Derailleur is the heart of the whole AXS system. You'll enjoy instantaneous shifts from a single touch, even under extreme chain loads during the heat of racing. It's built with a lightweight carbon fiber cage and titanium hardware that make it an ideal choice for XC riding and racing, as opposed to the enduro-focused XO1 derailleur with its forged aluminum cage. It features a shorter cage for 10mm more ground clearance than mechanical Eagle, with more chain wrap on the cassette to sit slightly further forward and further inboard from mechanical Eagle, all of which gives you more clearance against rock strikes. The Eagle AXS derailleur is also smart enough to protect itself thanks to its innovative and resilient Overload Clutch. In the event of an impact, the motor gearbox disengages, giving the derailleur freedom to move, and instantly returns back to its position while avoiding damage to the internal motor. The XX1 AXS derailleur is tested to the IP69K water and dust proofing standard so whatever race day brings, you'll be ready.

Features

  • Material: [cage] carbon fiber, [hardware] titanium, [bearings] steel
  • Capacity: [max tooth] 50
  • Cassette Range: 10 - 50t
  • Compatibility: SRAM Eagle AXS shifters (controller), SRAM X-DOME Eagle cassettes
  • Recommended Use: mountain
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Brand: SRAM   |   Manufacturer: SRAM

Item Dimensions: 4 x 8 x 8 inches (10.2 x 20.3 x 20.3 cm)   |   Package Dimensions: 4 x 8 x 8 inches (10.2 x 20.3 x 20.3 cm)

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