Shimano GRX RD-RX825
Best electronic shifting for serious gravel and adventure riders.
This electronic rear derailleur brings precise, reliable shifting to gravel riding. With an integrated clutch mechanism, it keeps the chain secure over rough terrain while delivering the crisp, consistent performance expected from high-end electronic groupsets.
$445.00
at
Sierra Cyclesmith
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 Rear Derailleur
$145.00
Shimano GRX RX817 Di2 Rear Derailleur
$400.00
Shimano GRX RD-R815
$349.99
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 flawless, reliable gear changes.
- Adventurous cyclists needing a resilient drivetrain for rough terrain.
- Existing Shimano users upgrading their gravel bike components.
Who should skip it
- Budget-conscious riders prioritizing value over electronic convenience.
- Bikepackers and touring cyclists preferring mechanical simplicity.
- DIY mechanics or those without access to professional bike shops.
Performance breakdown
Shifting Precision
Electronic actuation eliminates cable stretch for consistently perfect gear changes.
Chain Retention
The Shadow Plus clutch keeps the chain secure on the roughest terrain.
Setup Complexity
Requires Di2 knowledge, but software integration makes fine-tuning incredibly straightforward.
Durability
Rugged construction handles mud, grit, and gravel abuse with ease.
Weight Efficiency
Balances robust off-road protection with a surprisingly lightweight electronic profile.
Ergonomic Integration
Seamlessly pairs with Di2 shifters for intuitive, effortless gear selection.
Key Specs
Drivetrain
12-speed
Shifting
Electronic (Di2)
Derailleur Position
Rear
Cage Length
Long
Clutch
Yes (Shadow Plus)
Compatibility
2x systems
Mounting Type
Hanger
Know before you buy
Still have a question?
Ask Metto anything about the Shimano GRX RD-RX825 before you decide.
