Shimano GRX RD-RX815 Di2 2 x 11 Speed Gravel Bike Rear Derailleur 34T Max Road
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About this product
The Shimano GRX RD-RX815 Di2 is an 11-speed gravel bike rear derailleur, designed for 2x drivetrains with a maximum 34T sprocket. Constructed from aluminum, this black derailleur features Di2 electronic shifting for precise gear changes. It has a long cage length and a bolt-on mounting type, making it suitable for cyclocross, gravel, racing, and touring bikes. Manufactured in Japan, it provides reliable performance for diverse terrain.
Our take
For gravel riders looking for precise and reliable shifting, the Shimano GRX RD-RX815 Di2 rear derailleur is a top-tier option. The electronic Di2 system provides incredibly smooth and consistent gear changes, which is a major advantage on variable terrain. Being an 11-speed unit with a 34T max capacity means it handles a good range for climbing without issue. The aluminum construction ensures durability without excess weight, and the long cage is appropriate for a wide gear spread. At $99.95, it's an excellent value for a Di2 component, but remember you'll need the rest of a Di2 system to make it work.
Pros & Cons
Pros
- Precise Di2 electronic shifting
- Durable aluminum construction
- 11-speed with 34T max capacity
- Long cage for wide gear range
- Designed for gravel and cyclocross
Cons
- Requires Di2 electronic system
- Only 11-speed compatible
Specifications
- Compatible Brand Shimano
- Color Black
- Set Includes Derailleur (Rear)
- Material Aluminum
- MPN IRDRX815, RD-RX815
- Mounting Type Bolt-On
Show all 14 specifications
- Number of Speeds
- 11 Speed
- Brand
- Shimano
- Model
- GRX Di2
- Compatible Bike Type
- Cross Bike, Cyclocross Bike, Gravel Bike, Racing Bike, Touring Bike
- Number of Items
- 1
- Country of Origin
- Japan
- Part Type
- Rear Derailleur
- Derailleur Cage Length
- Long Cage
