Shimano GRX RD-RX820 12-Speed Gravel Rear Derailleur – Shadow Plus & Direct Mount

Master Rugged Terrain with Shimano’s RD-RX820 Rear Derailleur

Engineered for demanding cyclists who conquer mixed surfaces—from rocky mountain trails to gravel backroads—this 12-speed rear derailleur ensures flawless performance where others falter. Compatible with both 11-34t and 11-36t cassettes, it delivers an expansive gear range to maintain your ideal cadence during steep climbs or high-speed flats.

Key Innovations for Uncompromised Rides:
– Shadow RD+ Stabilizer System: Eliminates chain slap and drops on technical descents, keeping your drivetrain whisper-quiet even over roots and rubble.
– Smart Terrain Adaptation: Flip the ON/OFF switch to disable stabilization on smooth pavement (boosting efficiency) or engage it for unrivaled control when tackling chunky singletrack.
– HG 12-Speed Optimization: Seamlessly pairs with Shimano’s hyperglide chains for rapid, crisp shifts under load.

Why Trail & Gravel Riders Trust It:

“No more mid-descent mechanical panic! The stabilizer locks my chain in place through washboard sections.” – Verified MTB User
Ideal for endurance adventurers and aggressive trail riders, this derailleur transforms chaotic terrain into predictable precision. Forget noisy chains or hesitation—focus solely on your line while the RD-RX820 handles security.

Performance Comparison
| Feature | RD-RX820 | Standard Derailleurs |
|——————|——————————|—————————–|
| Chain Retention | Active Stabilizer + Shadow RD+ | Basic tensioners |
| Noise Reduction | Near-silent on rough terrain | Frequent chain slap |
| Terrain Response | ON/OFF switch adaptability | Fixed setup |
| Compatibility | 11-34t/36t 12-speed cassettes| Limited cog ranges |

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