no, not open.
all steel, not cast. shipped with oem, not an aftermarket item.
I remember the acorn nut thing, from I think, speedway 95 in maine...
peugeot was an odd one. They might be called female studs just for them, for all I know. Simply gargantuate compared to normal. hefty buggers. love the setup. (I broke the oem 13 inch wheels- these fixed it by a ton). I also specifically got some t-rated yokohama to meet that part of the rules.
attempting to erase doubts..although local, it is still a haul for me to loring.