Shimano GRX Di2 RD-RX815
The Shimano GRX rear derailleur is an electronic 11-speed unit tuned for gravel with a clutch, stabilizer, and 40T capacity. It suits gravel racers and off-road cyclists who want wireless shifting and chain security on rough terrain.
- GRX Di2 11 speed rear derailleur for double cranks
- Adjustable chain stabilizer prevents chain slapping and drops
- Gravel-tuned clutch tension can be toggled ON/OFF to match the terrain
- Maximum front difference: 17T
- Total capacity: 40T
- Low sprocket: Max. 34T/Min. 30T
Pre-order — expected in stock September 25, then ships direct to you.
Pairs well with
Shimano GRX Di2 RD-RX815
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