Another slightly cheap and slightly nasty copy of a Shimano Tourney TY15 from the up-and-coming chinese city of Ningbo. Unlike the SunRun HG-04A, the Saiguan has a torsion spring.
- Derailleur brands: Saiguan
- Country: China
- Date of introduction: 2003?
- Date of this example: 2003?
- Model no.: HG-03
- Weight: 271g
- Maximum cog: 32 teeth?
- Total capacity: 36 teeth
- Pulley centre to centre: 75mm
- Index compatibility: friction
- Chain width: 3/32”
- Logic: top normal
- B pivot: sprung
- P pivot: sprung
- Materials: steel