For rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain tensioner.
Shimano GRX Rear Derailleur Shadow+ RD-RX812 - 1 x 11 Speed
Shimano GRX Rear Derailleur Shadow+ RD-RX810 - 2 x 11 Speed
Shimano GRX Rear Derailleur Shadow+ RD-RX812 1x11 Speed New
SHIMANO MTB Rear Derailleur Pulley DEORE XT 8000/8050 Black
Genuine Shimano Altus Rear Derailleur M310 7 8 Speed Mech Bolt on Direct Mount
Shimano Tourney Rear Derailleur RD-A070 SIS Index 7 Speed Bolt-On/Hanger Mount-H
