I have several vintage NOS chain rings with part numbers. Is there a way to look them up to see what the specs are? Example: I have 4 rings with 24T, 68BCD:

  • two of them have part# 17L24000 stamped 1G L-24
  • two of them have part# 4-1C424000 stamped M9 P-24.

Do these differ somehow?


The first is a Shimano M950 chainring: https://si.shimano.com/pdfs/ev/EV-FC-M950-1591.pdf

The second is a Shimano M952 chainring: https://si.shimano.com/pdfs/ev/EV-FC-M952-4-1757.pdf

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