Another slightly cheap and slightly nasty copy of a Shimano Tourney TY15 from the up-and-coming Chinese city of Ningbo. A modern touch is the helical tension spring in the parallelogram.
- Derailleur brands: SunRun
- Country: China
- Date of introduction: 2006?
- Date of this example: 2006?
- Model no.: HG-04
- Weight: 266g
- Maximum cog: 32 teeth?
- Total capacity: 35 teeth
- Pulley centre to centre: 75mm
- Index compatibility: 6 speed?
- Chain width: 3/32”
- Logic: top normal
- B pivot: sprung
- P pivot: sprung
- Materials: steel
