Shimano, Acera RD-T3000, Rear derailleur, 9sp., SGS cage, Black

Shimano's Acera rear derailleur makes use of advanced designs that make it shift better and last longer. HyperGlide technology results in faster shifting, and Double Servo technology utilizes a double servo-panta mechanism that enables the rear derailleur to track perfectly to each shift and maintain an optimum distance from each sprocket.

- Maximum cog size: 34t
- Total capacity: 45t
- Pulleys: 11t
- Chain compatibility: HG 9-speed