Shimano Altus Rear Derailleur RD-M2000-SGS (9-Speed, Long Cage)
Shimano GRX Rear Derailleur RD-RX400 (10-Speed Gravel)
The Shimano GRX RD-RX400 rear derailleur is purpose-built for gravel riding, adventure cycling, bikepacking, and mixed-surface performance.
Featuring Shimano's Shadow RD+ clutch technology, the RD-RX400 helps reduce chain slap and improves chain retention when riding on rough roads, gravel paths, and trails. Designed for 10-speed drivetrains, it delivers precise, dependable shifting while maintaining excellent chain stability in demanding conditions.
Features
Shimano GRX RD-RX400 rear derailleur
Compatible with 10-speed drivetrains
Shimano Shadow RD+ clutch technology
Improved chain retention and reduced chain slap
Designed specifically for gravel and adventure riding
Smooth and reliable shifting performance
Compatible with wide-range gravel gearing setups
Lightweight and durable construction
Condition
Brand New
Genuine Shimano retail packaged product
Compatibility
Shimano GRX 10-speed shifters
Shimano Tiagra 4700 10-speed road systems
Shimano 10-speed HG-X chains
Gravel bikes, adventure bikes, cyclocross bikes, touring bikes, and endurance road bikes
Compatible with cassettes up to 36T maximum sprocket size
Whether you're building a dedicated gravel bike or upgrading an existing adventure rig, the Shimano GRX RD-RX400 provides the chain security, reliability, and shifting performance needed to tackle everything from pavement to rugged backroads with confidence.
Free shipping available on orders over $150 before tax.
The Up-Cycle Inc.
📍 2854 Ellesmere Road, Scarborough, Ontario M1E 4B8
📞 (647) 389-6420
Your source for affordable bicycle parts, refurbished bicycles, professional repairs, and cycling accessories in Scarborough and the Greater Toronto Area.