I've got a non-lowered 2006 xB w/ 16"x 8" (or 7"?) Konig Theory wheels.
These wheels were on my Miata and have 195/45R16 Yokohamas on them right now and they are smaller overall diameter than the stock 15" tires and they look too small. TireRack.com recommends 205/50R16 for a 16" wheel to achieve a stock overall fit.

Has anybody tried a 215 or 225/50R16? What's the biggest that will fit without rubbing on a non-lowered xB?

Thanks!

 

i don't think you would have any problems with the car not being lowered.
alot of the problem will depend on the offset, if you ever lower it.