To piggy back on this thread which would be the better choice for a rim size for drag radials on a 2013 GT auto with stock gearing. 15x8 or 17x9.5? Maybe 15x10 too if I get a relocation bracket for the sway bar. Then also will a 26" or 28" tall tire work better? I've been leaning towards 15x8 with 275/50-15 MT ET Street Radials.
15x10s will lay a 275 flatter on the ground than 15x8s do. But on your 2013 GT, you'd need this: 05-14 Ford Mustang Rear Sway Bar Relocation Kit | UPR