Thanks for the link. As I said, I don't use the really low gears I have, so the front chain wheel change would be a simple bolt-unbolt project , I think ? , plus maybe some chain links or replacement ? There would be no need to touch the derailer etc. My shifter and wheels are working real well, so if it aint broke etc, etc, Tried googling for chain wheels, but my eyes glaze over with so many options and variations . Again thanks.

charlie