I just got 19" Racing Hart C4's on my G35 silver coupe. However how do I know if the offset is right? The guy at the shop never mentioned anything about it. What are the consequences of having the wrong offset? Let me know.......

 

if it clears the brembos and doesnt stick too far out or too tucked in in the wells then your strait, dont worry. Really only something you need to worry about when looking for and purchasing the rims.

 

For fitment reference that's fine, but when you use too aggressive of an offset
you could introduce tramlining and premature wear on the bearings.