Shimano GRX Rear Derailleur
Best reliable shifting for serious gravel and adventure riders.
This 12-speed rear derailleur is built for gravel adventures, offering broad gear range support up to a 51T cog. Its robust construction and sealed pulley bearings ensure reliable performance on rough terrain, while multiple cage options provide setup flexibility. It's a solid choice for building a capable gravel bike.
$145.00
at
Cambria Bike
More GRX options
Shimano GRX RX815 Rear Derailleur
$359.99
Shimano GRX RX400 Front Derailleur
$43.00
Shimano GRX Front Derailleur
$59.99
Shimano Stabilizer Unit
$14.00
Shimano GRX RX812 Rear Derailleur
$119.99
Shimano RD-RX820 Pulley Set
$25.00
Shimano Rear Derailleur Pulley Set
$25.99
Shimano GRX RX815 Derailleur
$290.00
Shimano GRX DI2 Rear Derailleur
$400.00
Shimano GRX Di2 Front Derailleur
$225.00
Shimano GRX RX810 Front Derailleur
$65.00
Shimano GRX RX400 Rear Derailleur
$60.99
Shimano GRX FD-RX815-F
$290.00
Shimano GRX RD-RD400 Rear Derailleur
$74.99
Shimano GRX RX817 Di2 Rear Derailleur
$400.00
Shimano GRX RD-R815
$349.99
Shimano GRX RD-RX825
$445.00
Shimano GRX RD-RX815
$359.99
Shimano GRX RD-RX822-SGS
$145.00
Shimano GRX RX810
$117.99
Shimano GRX RX400 Front Derailleur
$43.00
Shimano GRX FD-RX820-F Front Derailleur
$70.00
Shimano GRX RD-RX825 Di2
$445.00
Shimano GRX FD-RX820-F
$70.00
Shimano GRX RD-RX820
$70.00
Shimano GRX RD-RX827
$565.00
Shimano GRX FD-RX815
$289.99
Shimano GRX Di2 Rear Derailleur
$400.00
Shimano GRX RD-RX825 Di2
$445.00
Shimano GRX RD-RX400
$67.50
Shimano GRX RD-RX717 Di2 Rear Derailleur
$435.00
Who it's for
- Gravel riders seeking reliable chain management on challenging terrain
- Adventurous cyclists needing a resilient drivetrain component for off-road exploration
- Single-chainring enthusiasts desiring a broad gear range for varied topography
Who should skip it
- Riders preferring the closer gear steps and range of a 2x drivetrain
- Weight-conscious racers prioritizing every gram for competitive advantage
- Budget-conscious riders seeking more affordable drivetrain options
Performance breakdown
Chain Retention
The clutch mechanism keeps the chain secure over the roughest gravel chatter.
Shifting Precision
Crisp, reliable gear changes even under heavy pedaling loads.
Gearing Range
Massive 51T support handles the steepest climbs with ease.
Durability
Sealed bearings and robust construction withstand grit and harsh weather conditions.
Weight Efficiency
Lightweight design balances performance without sacrificing structural integrity.
Installation Versatility
Multiple cage options provide flexibility for various drivetrain configurations.
Key Specs
Cage Length
GS/Medium, SGS/Long
Total Capacity
35T, 41T
Max Low Sprocket
45T, 51T
Min Low Sprocket
45T, 51T
Rear Speeds
12
Mount
Direct attachment (conventional)
Guide Pulley Bearing
Sealed bearing
Tension Pulley Bearing
Sealed bearing
Number Of Pulley Teeth
13
Series
GRX
Know before you buy
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