here's some P295/50/15 BFG Radial TA's plenty of room
mounted on some 15"x9.5" "Edelbrock" Halibrand w-5" BS
they have a really thick outer bead flange,
so they are more like being on 9" wide wheels, no clearance issues at all...
with knock off covering the lugs/locks on polished kidney slots,
on the
rear of my current 68 RR