I have aftermarket 19inch rims, here are the specs, I have had no issues. Also, the rim fittiment were specifically for the Spyder (the coupe is the same)
Front 19x 8 62.2 MM Offset
rear---19 x 9.5 55.5 MM offset
5 x108
Stock is
18 x 8 ---63.7 mm
18.9.5 ----55.5 mm
Front 19x 8 62.2 MM Offset
rear---19 x 9.5 55.5 MM offset
5 x108
Stock is
18 x 8 ---63.7 mm
18.9.5 ----55.5 mm