The venerable Shimano Altus rear derailleur. Solid and affordable. Technically 9spd.
- Cage: SGS (long)
- Total capacity: 45 teeth
- Max front difference: 22 teeth
- Includes cable adjuster
- Conventional direct attachment
- Max low gear sprocket: 34-teeth (unofficially this works with 36t if you're using a double crank)