Originally Posted by
bulgie
Does anyone know, did they quit using the two-letter code after 2003, or is that just when this chart was made?
Speaking of funny coincidences, they recalled a batch of 74 mm BCD granny rings, and the ones that were no good had the date code NG.
Thanks
Mark B
Best I could find was this, they seem to think it repeated itself.
https://forum.bikehub.co.za/topic/14...des-explained/
This is a great link to Shimano’s own site with explanation.
https://www.sjscycles.co.uk/shimano-id-guide/