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HomeRear Derailleurs

10 Best Rear Derailleurs Of 2026

Rear Derailleurs — Reviews, Recommendations & Updated Buying Guide May 2026

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🏆Our Top Pick
Shimano Rear Mech TY300 6/7spd direct
01
9.9
Exceptional
(1,747 reviews)
🔥 1 interested

Shimano Rear Mech TY300 6/7spd direct

Shimano
DISCOUNTED TODAY

Why We Love It

The best entry-level derailleur for smooth gear transitions
Masters both 6 and 7-speed drivetrains effortlessly
Direct mounting keeps your bike clean and responsive
9.9
Exceptional
(1,747 reviews)
🔥 1 interested
Available at AmazonShow Offer
SHIMANO,ERDM5120SGS Deore Deore M5120 rear derailleur, 10/11-speed, Shadow+, SGS long cage, Black
02
9.6
Exceptional
(3,260 reviews)

SHIMANO,ERDM5120SGS Deore Deore M5120 rear derailleur, 10/11-speed, Shadow+, SGS long cage, Black

SHIMANO,ERDM5120SGS
DISCOUNTED TODAY

Why We Love It

Shadow+ technology smooths gear shifts with precision timing
SGS long cage handles 10/11-speed chains effortlessly
Premium Deore M5120 delivers unmatched performance reliability
9.6
Exceptional
(3,260 reviews)
Available at AmazonShow Offer
Shimano Tourney TX RD-TX800 Schal 7/8-fach schwarz 2016 Mountainbike
03
9.3
Excellent
(3,453 reviews)

Shimano Tourney TX RD-TX800 Schal 7/8-fach schwarz 2016 Mountainbike

Shimano
DISCOUNTED TODAY

Why We Love It

7/8-speed versatility conquers any terrain transitions
Shimano Tourney TX proven workhorse for mountain adventures
Schwarz finish resists corrosion through seasons
9.3
Excellent
(3,453 reviews)
Available at AmazonShow Offer
Shimano RD-TY500 Tourney Rear DERAILLEUR
04
9.1
Excellent
(3,432 reviews)

Shimano RD-TY500 Tourney Rear DERAILLEUR

Shimano
DISCOUNTED TODAY

Why We Love It

Tourney engineering brings trusted Shimano to every ride
Entry-level power without sacrificing shift quality
Durable construction handles daily commute demands
9.1
Excellent
(3,432 reviews)
Available at AmazonShow Offer
CYSKY Bicycle Rear Derailleur 6/7/8/9/10/11 Speed Direct Mount for Mountain Bike Road Bike
05
8.9
Very Good
(1,118 reviews)

CYSKY Bicycle Rear Derailleur 6/7/8/9/10/11 Speed Direct Mount for Mountain Bike Road Bike

CYSKY
DISCOUNTED TODAY

Why We Love It

6/7/8/9/10/11-speed compatibility covers virtually any bike
Direct mount design simplifies installation instantly
Works seamlessly with Shimano and Sram systems
8.9
Very Good
(1,118 reviews)
Available at AmazonShow Offer
YelaJoy Trek Compatible Derailleur Hanger，Includes 2 Derailleur Hanger Screws，Easy to Install，Upgrade for Performance (Black)
06
8.7
Very Good
(3,745 reviews)

YelaJoy Trek Compatible Derailleur Hanger，Includes 2 Derailleur Hanger Screws，Easy to Install，Upgrade for Performance (Black)

YelaJoy
DISCOUNTED TODAY

Why We Love It

Outstanding choice with 2 replacement screws included
Trek-compatible design fits perfectly on your frame
Exceptional pick for quick, tool-free installation
8.7
Very Good
(3,745 reviews)
Available at AmazonShow Offer
SHIMANORear derailleur Roller.
07
8.5
Very Good
(3,499 reviews)

SHIMANORear derailleur Roller.

SHIMANORear
DISCOUNTED TODAY

Why We Love It

OEM Shimano roller ensures original performance standards
Precision-engineered replacement extends derailleur lifespan
Direct Shimano part guarantees perfect fitment
8.5
Very Good
(3,499 reviews)
Available at AmazonShow Offer
Shimano RD-TY500 Tourney Rear DERAILLEUR
08
8.4
Good
(2,776 reviews)

Shimano RD-TY500 Tourney Rear DERAILLEUR

Shimano
DISCOUNTED TODAY

Why We Love It

Tourney reliability keeps commuters rolling smoothly
Simple mechanical design requires minimal maintenance
Perfect stepping stone into gear management basics
8.4
Good
(2,776 reviews)
Available at AmazonShow Offer
Steel Rear Derailleur Chain Stay Guard Gear Protector for Outdoor Mountain Road Cycling
09
8.2
Good
(4,034 reviews)

Steel Rear Derailleur Chain Stay Guard Gear Protector for Outdoor Mountain Road Cycling

Steel
DISCOUNTED TODAY

Why We Love It

Excellent steel construction outlasts plastic competitors
Strong performer protecting rear derailleur from impacts
Durable gear protector for mountain and road cycling
8.2
Good
(4,034 reviews)
Available at AmazonShow Offer
Bicycle rear derailleur
10
8
Good
(4,513 reviews)

Bicycle rear derailleur

DISCOUNTED TODAY

Why We Love It

7/8/9/10-speed range accommodates diverse bike types
Straightforward design proves dependable season after season
Universal compatibility saves compatibility headaches
8
Good
(4,513 reviews)
Available at AmazonShow Offer

Quick Pick

10 Best Rear Derailleurs Of 2026

Quick Pick

#1
Shimano Rear Mech TY300 6/7spd direct

Shimano Rear Mech TY300 6/7spd direct

View Details
#2
SHIMANO,ERDM5120SGS Deore Deore M5120 rear derailleur, 10/11-speed, Shadow+, SGS long cage, Black

SHIMANO,ERDM5120SGS Deore Deore M5120 rear derailleur, 10/11-speed, Shadow+, SGS long cage, Black

View Details
#3
Shimano Tourney TX RD-TX800 Schal 7/8-fach schwarz 2016 Mountainbike

Shimano Tourney TX RD-TX800 Schal 7/8-fach schwarz 2016 Mountainbike

View Details
#4
Shimano RD-TY500 Tourney Rear DERAILLEUR

Shimano RD-TY500 Tourney Rear DERAILLEUR

View Details
#5
CYSKY Bicycle Rear Derailleur 6/7/8/9/10/11 Speed Direct Mount for Mountain Bike Road Bike, Compatible with Shimano Sram Front Rear Derailleurs

CYSKY Bicycle Rear Derailleur 6/7/8/9/10/11 Speed Direct Mount for Mountain Bike Road Bike, Compatible with Shimano Sram Front Rear Derailleurs

View Details
#6
YelaJoy Trek Compatible Derailleur Hanger，Includes 2 Derailleur Hanger Screws，Easy to Install，Upgrade for Performance (Black)

YelaJoy Trek Compatible Derailleur Hanger，Includes 2 Derailleur Hanger Screws，Easy to Install，Upgrade for Performance (Black)

View Details
#7
SHIMANORear derailleur Roller.

SHIMANORear derailleur Roller.

View Details
#8
Shimano RD-TY500 Tourney Rear DERAILLEUR

Shimano RD-TY500 Tourney Rear DERAILLEUR

View Details
#9
Steel Rear Derailleur Chain Stay Guard Gear Protector for Outdoor Mountain Road Cycling

Steel Rear Derailleur Chain Stay Guard Gear Protector for Outdoor Mountain Road Cycling

View Details
#10
bicycle rear derailleur, rear derailleur 7/8/9/10 speed bicycle rear wheel gear bicycle derailleur for road bike

bicycle rear derailleur, rear derailleur 7/8/9/10 speed bicycle rear wheel gear bicycle derailleur for road bike

View Details

Buying Guide: Rear Derailleurs

📋 Table of Contents

  1. 1.How do I know if a rear derailleur will fit my bike?
  2. 2.What's the difference between short cage and long cage derailleurs?
  3. 3.When should I spend more on a higher-end derailleur?
  4. 4.How do I check my current derailleur's capacity before replacing it?
  5. 5.What's the practical difference between 11-speed and 12-speed derailleurs?

1How do I know if a rear derailleur will fit my bike?

You need to match three things: the shifter type (Shimano, SRAM, or Campagnolo), the speed count (8, 9, 10, 11, or 12-speed), and the mounting style (direct mount or conventional). Check your current shifters and cassette to find these specs, as mixing brands or speeds won't work properly.

2What's the difference between short cage and long cage derailleurs?

The cage length determines the maximum sprocket size your derailleur can handle. Short cage works best for road bikes with smaller cassettes (up to 28 teeth), while long cage suits mountain bikes and gravel setups with larger cassettes (up to 46 teeth). Using the wrong cage can cause poor shifting and chain slap.

3When should I spend more on a higher-end derailleur?

Upgrade if you ride frequently or competitively and want faster, more precise shifting with less maintenance. Entry-level derailleurs work fine for casual riding, but premium models use better materials that shift smoother under load and last longer in harsh conditions.

4How do I check my current derailleur's capacity before replacing it?

Look at the largest and smallest sprockets on your cassette, then subtract the smallest number from the largest—this is your total capacity (for example, 46-11 tooth has 35-tooth capacity). Your new derailleur must handle this capacity or larger, or it won't shift smoothly to all gears.

5What's the practical difference between 11-speed and 12-speed derailleurs?

12-speed systems offer closer gear spacing for smoother pedaling but require a completely new drivetrain (shifters, chain, cassette). If you're upgrading from 11-speed, stick with 11-speed unless you're rebuilding your entire drivetrain—mixing 11 and 12-speed parts won't work together.

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