I am new to Bike Forums and am curious about my vintage Nishiki Colorado - I welcome your input and suggestions for more information. The serial number on the bottom of my bike is: GR868851.
Do you know of any sources for ads or catalogs for Nishikis from this period?
Also, I saw a Diamondback catalog dated 1988, and the Apex looks nearly identical.
Did Giant make Diamondbacks? Thanks much.