Hello All,
Long shot.... I am in search of an inner chainring to attach to my Bianchi P-R. Unfortunately the inner chainring was missing when I purchased this bike. The chainring hole center to center is about 84mm. I think this is the same spec as a 50s Bianchi Campione del Mundo. If you have the original mounting hardware, that would be golden.
Regards,
David Martinez
Fremont Ca
US of A