hey guys, just switched back from a aftermarket 19 to 07 Z 5 spoke 18s.. after driving above 40-50 all the way up, the car vibrates BADLY.. is it because i need a spacer since the offset is off or something is wrong with the axle.. thanks guys

 

i took the aftermarket ring off before i put these OEM wheels back on... does it has anything to do with that?

 

did you check your torque specs? maybe they weren't seated right when you torqued them (if you even did)

 

If there was no apparent problem before you put the 350Z 18's on there, then it's the new wheels. Check for bends, they might need balancing too.