would a 315 drag radial fit?
A 315 is ideal for a 11" wheel. Anything smaller will cause the tire to bluge and loose surface area on the tread. Some people mush them on a 10.5", but that is a mistake IMO.
If you are going to go for a 18" C6 rim, then go with a 275 wide tire or possibliy a 295.
Keith






