Genuine Shimano Alivio RD-M4000/M430/ Acera RD-M390 Ten
SHIMANO ACERA M390 suite 9 speed 27 speed mountain bike transmission medium and small suite - Price history & Review | AliExpress Seller - Shop2853048 Store | Alitools.io
Shimano Acera RD-M390 derailleur replacement at home | Replace derailleur without opening chain 👍 - YouTube
Shimano Acera RD-M390 derailleur replacement at home | Replace derailleur without opening chain 👍 - YouTube