I'm runnin 17x10.5 rims with 315-15-17 tires. You can pick up the nitto 555R in that size and I've only heard good things about them.
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95 Mustang Cobra
347 Stroker, Cobra Heads/Intake, Comp Cams Magnum 270 cam, Upper/Lower Control Arms, Subframe Connectors, Strange 10 Way Adjustable Struts/Shocks, Eibach Drag Launch Springs, MGW short throw shifter, O/R h pipe, SLP lm1 Catback, K&N big cone filter. Still running on the stock tune