Shimano GRX Di2 RD-RX827 SGS 1x12 rear derailleur

The Shimano GRX Di2 RD-RX827 SGS 12-speed rear derailleur is designed for serious gravel riding and the roughest terrain. Featuring fully wireless technology, it ensures fast, precise and reliable gear changes, even in the most demanding conditions.

Its robust design, featuring reinforced links, a protective plate and sturdy pulleys, guarantees exceptional durability. The new automatic recovery function instantly returns the derailleur to position after an impact, so you can ride with confidence.

Thanks to SHIMANO SHADOW ES technology and SHADOW RD+ chain stabilisation, it maintains chain tension, reduces unwanted chain skipping and optimises the smoothness of gear changes. The integrated battery, fully protected within a waterproof housing, remains stable on the most demanding trails, whilst being easy to remove for recharging.

Paired with a 10-51-tooth cassette, this derailleur offers an ideal gear range for tackling both long climbs and fast descents. It is the perfect choice for gravel enthusiasts seeking performance, reliability and safety.

Technical specifications

- Use: Gravel
- Gears: 12-speed (1x12)
- Technology: Wireless – Shimano Di2
- Cassette compatibility: 10-51 teeth
- Function: Automatic recovery after impact
- Stabilisation: SHIMANO SHADOW ES
- Battery: Integrated and protected, removable for charging
- Reference: IRDRX827SGSA
- Brand: Shimano