Shimano GRX RD-RX825 12s rear derailleur black

The Shimano GRX 825 Di2 12V derailleur is an electronic rear derailleur specifically designed for gravel bikes, offering exceptional performance and high reliability on mixed and challenging terrain.It incorporates SHIMANO SHADOW RD+ technology with an adjustable chain stabiliser that prevents chain bounce and slap, ensuring precise and smooth shifting even on uneven surfaces. This derailleur features an ON/OFF stabiliser switch to adapt to different types of terrain, activating for gravel and deactivating for smooth roads.The 12-speed GRX Di2 derailleur includes an integrated wireless connectivity unit and a charging port for easy recharging. Compatible with cassettes up to 12 speeds, it supports large sprockets up to 11 teeth and small sprockets up to 36 teeth, with a total capacity of 40 teeth, making it versatile for various setups and riding styles.