My rims are 17x9 on all 4 corners. Here’s my combo (Toyo Proxes ST II) Front: 225/55R17 Rear: 275/55R17
If you want the same tire front and rear and similar diameter as original G60 tires, the 245/50 x 17 would work well. If you want to sit a little higher, the 235/55 x 17 would work. The 275/55 x 17 is a 29.1 inch tall tire. Pretty tall for a Skylark IMO. https://www.tirerack.com/tires/tire...HTRASP02&vehicleSearch=false&fromCompare1=yes