SHIMANO ACERA Rear Derailleur 8-speed RD-M3020-8 NEW Double Servo rear derailleur with smooth, precise shifting performance and wide-range capability. The SHIMANO ACERA M3020-8 rear derailleur with Double Servo technology helps you ride challenging terrain with fewer interruptions. FEATURES Double Servo construction for smooth and precise shifting Versatile performance and wide compatibility Max. low sprocket: 40T Total capacity: 45T PRODUCT SPECIFICATIONS MODEL NO RD-M3020-8 SERIES SHIMANO ACERA M3000 Series Color Black Rear speeds 8/7 Compatible chain HG 8/7/6-speed Top-Normal spring type|Double servo ✔ Mount|Direct attachment (Conventional) ✔ Cable adjuster ✔ Max. front difference 20T Total capacity 45T Low sprocket|Max. 40T Low sprocket|Min. 30T Top sprocket|Max. 12T Top sprocket|Min. 11T Fluoric coated link bushings 1 Pulley|Teeth 11T Pulley|Sunken type pulley bolt ✔

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