Cycle Plus BD - Shimano M4000 Alivio Shadow 3×9-speed Groupset Features: Silent: Allows you to concentrate on riding - feel nature without disturbances Slim/Smooth: Easy to control - easy shifting and braking
SHIMANO ALIVIO M3100 Rear Derailleur SHADOW RD 9 speed For MTB Bike Mountain Bike Original parts 9 Speed Rear Derailleur|Bicycle Derailleur| - AliExpress
Shimano Alivio 9-speed budget groupset | Everything you need to know - BikeRadar