Shimano GRX RX400 10-Speed Rear Derailleur Long Cage Black Clutch MTB

Shimano GRX RD-RX400 10-Speed Rear Derailleur: Mastering Mixed-Terrain Performance

For gravel cyclists seeking precision and durability on rugged adventures, the Shimano GRX RD-RX400 rear derailleur delivers seamless shifting in even the harshest conditions. Designed for 10-speed systems, this derailleur combines silent operation with unmatched reliability on mixed surfaces—whether you’re tackling technical descents or long-distance endurance rides.

Key Features & Benefits:
– Shadow RD+ Chain Stabilizer: Eliminates chain slap and drops on uneven terrain while offering adjustable tension to adapt to varying riding conditions.
– Gravel-Tuned Clutch System: Optimized for off-road use, ensuring smooth gear transitions on loose gravel or wet pavement without compromising speed or control.
– Terrain-Adaptive Design: The stabilizer toggle allows riders to switch between modes for different surfaces—perfect for switching from smooth trails to rocky sections mid-ride.
– Shimano Ecosystem Compatibility: Works exclusively with select Shimano ST-RX400/ST-4700 series shifters for flawless integration within Shimano’s road and gravel drivetrains.

Technical Excellence:
Constructed with a Shimano Rear Direct Mount (RDM) system and 10×1 standard compatibility, this derailleur offers precise alignment and reduced maintenance needs. Its long cage design supports up to a 41-tooth wrap capacity and accommodates a 36-tooth largest cog—ideal for aggressive gearing setups on demanding routes. Weighing just 303 grams in sleek black finish, it balances lightweight performance with rugged durability.

Why Choose the GRX RD-RX400?
Outperform competitors in scenarios where chain stability matters most—think steep descents or high-speed sprints over uneven terrain. Unlike generic derailleurs designed for road use alone, this model prioritizes adaptability for mixed-surface exploration. Whether you’re conquering gravel epics or commuting on city streets littered with potholes, its advanced clutch system minimizes chain noise while maintaining precise shifting under load.

Quick Specs Comparison:
| Feature | Shimano GRX RD-RX400 | Competitor Model |
|————————|———————-|——————|
| Chain Wrap Capacity | 41 teeth | 36 teeth |
| Largest Cog Support | 36T | 32T |
| Weight | 303g | 325g |
| Terrain Adaptability | Fully adjustable | Fixed settings |

Elevate your gravel bike’s performance with a derailleur built for real-world challenges—quiet when you need it, robust when you don’t. Perfect for riders prioritizing versatility in unpredictable conditions.