What BCD are they?
Not a stupid question at all. I own a set of them and don’t know either. Just kinda thought “Huh, ok, weird design… anyway, next…” I’m interested too.How come there's only 3 holes on the spider and a adapter I never seen this before I new to this sorry if a stupid question mate
… t’internet…If you own a set I guess they haven't been cut that's what I origanly thought and someone made an adapter so they could be used