⚙️ Shift into the future of silent, smooth rides — don’t get left behind!
The Shimano GRX RX820 12-Speed Rear Derailleur delivers precise, silent shifting optimized for rough terrain. Featuring an adjustable chain stabilizer and Shadow RD+ technology, it reduces chain slap and drop, ensuring a smooth, reliable ride. Compatible with HG 12-speed chains and equipped with an ON/OFF stabilizer switch, it adapts seamlessly to mixed surfaces for professional-grade performance.
| Mounting Type | Clamp-On Mount |
| Number of Teeth | 36 |
| Manufacturer | Shimano |
| UPC | 192790303611 |
| Item Package Dimensions L x W x H | 14 x 10 x 3 inches |
| Package Weight | 1 Pounds |
| Item Dimensions LxWxH | 7 x 7 x 5 inches |
| Brand Name | SHIMANO |
| Suggested Users | mens |
| Number of Items | 1 |
| Part Number | IRDRX820 |
| Size | 12-Speed |
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