Shimano RD-M3020 Acera Rear Derailleur - 7/8 Speed Vision 5 x 70 cm 23

5 x 70 cm 23

2006-2009 Allez Jr

Auto-off for battery reserve

Steerer Clamp：28

Taurine supplementation improves amino acid levels in the muscles

Shimano RD-M3020 Acera Rear Derailleur - 7/8 Speed Vision 5 x 70 cm 23ACERA RD M3020 7 8 speed Rear Derailleur The Shimano ACERA RD M3020 7 8 speed rear derailleur provides smooth and precise shifting performance and a wide range capability. The SHIMANO ACERA M3020 8 rear derailleur with Double Servo technology helps you ride challenging terrain with fewer interruptions. Features Shimano ACERA RD M3020 8 Double Servo construction for smooth and precise shifting Versatile performance and wide compatibility Quick assembly