I have learned that the first couple of letters on a stamped Shimano part mean the part type e.g. FD - front derailleur, and the first digit indicates the series e.g.
M960 XTR/DCL 9s M950 XTR 9s M900 XTR 8s M800 Saint 9s M760 DeoreXT/DCL 9s M750 DeoreXT 9s M740 DeoreXT 8s M700 DeoreXT 7s M630 DeoreDX 7s M580 DeoreLX/DCL 9s M570 DeoreLX 9s M560 DeoreLX 8s M550 DeoreLX 7s M520 Deore 9s M510 Deore 8s
However, when I look at a couple of bikes, there is nothing similar:
- FC-M191 is an Alivio crank arm, while the "1" should have indicated a Tourney
- ST-EK70 and SL-M310 - those are both shifters, the first one with integrated brake lever. Why are the first two letters different? What is "EK"?
- CS-HG30-8I - cogset marking - wtf!?
Ideally, I would appreciate a .pdf Shimano catalogue, the paper version of hich I have seen at the LBS. Alternatively, explaination about my listed parts would also be an answer.