The original GT-R concept car had:
Front:
Pirelli P275/35/20 racing slicks
20 x 10-inch, 5-spoke billet aluminum wheels
Rear:
Pirelli P315/30/20 racing slicks
20 x 11-inch, 5-spoke billet aluminum wheels
Though I believe the GT-R had extended fender flares. My Saleen has 20x9...