I know they fit a 69 camaro because my budy bolted them up to his .. and they looked sick.
and we remeasured them
they are 9.5 inches inside of lip to inside of lip 10 inches out side to outside of tire mounting lip
so they could be considered 10 or 9.5 inches wide.
here are some pics added for you to see how they fit on a 69 ..
