I have a 1997 GT that I am working on and it has a Shimano Alivio FC-MC16 crankset as seen here:
The chainrings will unbolt but they are a riveted set and appears that it must be replaced as a unit. I have found another site stating that the PCD is 67mm yet I cannot find a chainring listed in this size. I am trying to learn and understand. My assumption is that I am just out of luck and the drivetrain needs to be replaced. I would like to keep this assembly if I can. Any thoughts?