SHIMANO
Rear Derailleur Shimano GRX RD-RX815 Di2 Top Normal 11-speed
Rear Derailleur Shimano GRX RD-RX815 Di2 Top Normal 11-speed
The Shimano GRX RD-RX815 Di2 is an 11-speed electronic gravel rear derailleur featuring an integrated chain stabilizer mechanism. It reduces chain slap and vibration, delivering quiet and precise shifting even on demanding terrain.
The adjustable clutch with ON/OFF switch allows you to tailor chain tension to riding conditions – lower resistance on smooth roads and maximum chain control on gravel and trails. The gravel-tuned clutch tension ensures reliable performance on rough surfaces.
The Di2 version offers Shimano electronic and synchronized shifting with digital precision. Compatible with road cassettes up to 34T, the RD-RX815 works seamlessly with road DUAL CONTROL LEVER shifters. Firmware updates are supported via E-TUBE PROJECT.
- Use: Gravel
- Series: Shimano GRX Di2
- Model: RD-RX815
- Speeds: 11
- Technology: SHIMANO SHADOW RD+
- Compatible cassette: 30–34T
- E-TUBE port: 1
- Firmware update: Yes
- Weight: approx. 287 g
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Shimano is a Japanese component manufacturer that since 1921 has been one of the world’s largest suppliers of bicycle drivetrains, brakes and cycling-specific parts. Shimano groupsets — from Tourney for city bikes to top-tier Dura-Ace — are found on virtually every serious bike brand. The company also makes fishing tackle and rowing components.