Shimano GRX Di2 RD-RX817 后拨链器 11速 长 笼 黑色

The Shimano GRX rear derailleur, with its integrated chain stabilizer, ensures quiet, safe, and precise shifting on mixed terrain. For riding on smooth surfaces, the chain stabilizer can be deactivated using the ON/OFF switch on the derailleur. The Di2 version of the RD-RX817 offers the digital precision of Shimano's electronic shifting combined with Synchronized Shifting and is compatible with road cassettes with a maximum 42T on the largest cog.

• Adjustable chain stabilizer
• The stabilizer can be switched on and off.
• Smallest sprocket: Max. 11 teeth/Min. 11 teeth
• Large sprocket: Max. 42T/Min. 40T

• 1 x Shimano GRX Di2 RD-RX817 rear derailleur 11-speed long cage black (see item description for details)