- Clutch design for ideal chain tension
- Alloy outer link with alloy cage construction
- Extra long cage option for wide range cassette
- Compatible with most Shimano 11sp drivetrains
- Model: M520c
- Speed: 11/12sp
- 2:1 ratio
- Cage: extra long
- Min/Max: 11/50t
- Capacity: 49t
- Weight: 260g.
- Color: black