I am building one of my good friends a fixed gear for christmas and I am working with an old 1980s giant manufactured nishiki century. I am unsure of replacing the bottom bracket/crankset because I do not know what size it is. Currently everything is stock and I don't want to waste a bunch of money buying a bottom bracket/crankset that does not fit. Does anybody know the size of the bb offhand?
any help would be appreciated.