Performance Bike
Shimano GRX RD-RX820 Switch Lever Unit & Fixing Plate (Black)
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From Performance Bike
Shimano RD-RX820 Switch Lever Unit & Fixing Plate Description: The Shimano RD-RX820 Switch Lever Unit & Fixing Plate is a replacement on/off switch for the chain tensioning device of the GRX RX-820 12-speed rear derailleur. Features: Compatible with the Shimano GRX RD-RX820 rear derailleur