Well, let me suggest you read some (if not all) of the previous posts on this subject.
Generally, the few 15" tires regarded as having a strong enough carcass for the G50 are the Michelin 235/60-15 Pilot XGTH and the Michelin 215/65-15 Pilot XGTV, and the Yokohama 225/60-15 AVS dB S2.
Sumitomo, other Yokohamas, Kumhos, Continentals Conti Sport, Falken and Nitto have (or are) being used by others.
Got to
http://www.tirerack.com and read after you have read the board posts.
Might want to check your rims (expecially the one you drove on) before mounting anything.
Modified by maxnix at 12:14 AM 10/23/2004