ok, i got some new wheels. ALT rival +42mm offset 18x7.5 w/ the stock Potenza RE050A 215 tires. the center bore is 73mm so i got some hub centric rings (67.2mm to 73mm) and mutegi tuner lugs. im getting quite a bit of vibration in the steering wheel at speeds of 60+mph. nothing violent, but its enough that it gets annoying. All the tires were balanced during mounting and im assuming they're facing the right direction since the "OUTSIDE" mark on the tires is facing outside. these are Y-rated tires btw so i don't believe they are directional. does anyone have a clue to why im getting the vibration?