This is a plausible copy of a Shimano Tourney (TY22 possibly - they have all become a blur) from our funky friends in Ningbo.

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1. •Brand: Saiguan
   

2. •Country: China
   

3. •Date of introduction: 2003?
   

4. •Date of this example: unknown
   

5. •Model no: HG-23
   

6. •Weight: 339g including hanger plate
   

7. •Maximum cog: 32 teeth?
   

8. •Total capacity: 36 teeth
   

9. •Pulley centre to centre: 85mm
   

10. •Index compatibility: 7 speed
    

11. •Chain width: 3/32”
    

12. •Logic: top normal
    

13. •Pivots: two sprung pivots
    

14. •Material: steel
    

0373/M