Shimano GRX RX815 Di2 11-Speed Rear Derailleur – Electronic Shifting

Description

Shimano GRX Di2 RD-RX815 11-Speed Rear Derailleur Built for the rough stuff, the Shimano GRX Di2 RD-RX815 rear derailleur blends electronic precision with gravel-ready resilience. Designed specifically for mixed terrain, it features Shimano’s proven Shadow RD+ clutch to reduce chain slap on rough roads and trails, while the Di2 electronic shifting delivers crisp, reliable performance even under load. Compatible with 11-speed 1x or 2x GRX drivetrains, the RD-RX815 handles up to a 42T cassette for 1x setups and 34T cassettes for 2x setups, making it a solid choice for riders tackling steep climbs and fast descents alike. It’s quiet, tough, and tuned for the unexpected.

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