The Shimano GRX RD-RX810 Bicycle Rear Derailleur is a high-quality, durable component designed specifically for 2x 11 speed gravel bikes. With its sleek black color and made of aluminum alloy, this rear derailleur offers precision and reliability for a smooth gear shifting experience. Perfect for riders looking to upgrade their road, cross, hardtail, or mountain bike, this Shimano rear derailleur is a top choice for those seeking top-notch performance and durability on the trails or on the road. Made in Japan by the renowned brand Shimano, this rear derailleur is sure to enhance any cyclist's riding experience.