Late 90s, metallic grey Shimano SG A-30 74 BCD inner chainring with 30 teeth for 9 speed drivetrains. I believe these are from the RX100 level triple chainsts, a nice XTR grey colour though.
- Model: SG-A
- 30 tooth inner chainring
- 74 BCD
- To suit 8/9 speed drivetrains
- 1997 date code
- Made in Japan