Wheel width for 315mm squared?

[roguegeek]

I'd like to expand the scope of my questions here. Let's say I go with 18x11.5, that will allow me to run all of the available 315/30ZR18 tires out there. What I haven't thought about is tires for when I'm daily driving. Yes, I could get a set of wheels that will better accept tires for the street, but what kind of smaller sizes could I fit on the 18x11.5? Could I fit a 295/30R18 like ones found in the Falken Azenis KF510 or comparable tire? Sizes where I can get higher UTQG ratings and are more mannered for daily driving. Would an 18x11.5 be capable of running something like that?