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.

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1. •Brand: SunRun
   

2. •Country: China
   

3. •Date of introduction: 2006?
   

4. •Date of this example: 2006?
   

5. •Model no: HG-04
   

6. •Weight: 266g
   

7. •Maximum cog: 32 teeth?
   

8. •Total capacity: 35 teeth
   

9. •Pulley centre to centre: 75mm
   

10. •Index compatibility: 6 speed?
    

11. •Chain width: 3/32”
    

12. •Logic: top normal
    

13. •Pivots: two sprung pivots
    

14. •Material: steel
    

0261/I