I just got a used 04 g35 a couple weeks ago and last time i was cleaning my rims i noticed something. All the tire are different sizes! I dont know much about tires and wheels so i was wondering, how bad is it to be riding around like that? I dont have much cash to buy a full set of tires, especially after spending $800 on new brakes but if I have to I will. One thing I noticed too, while driving on the freeway at about 65-70 the steering wheel vibrates abit. I can also hear a humming noise with each pulsing like vibration. It only happens when im taking a slight curve though. I thought it might be due to the tires but idk.
Any help is appreciated.

what are all the different tire sizes? The front and rear tires should be different if you have a coupe. Not left to right though

yea im not exactly sure what sizes they all are but EVERY wheel is a different size. ill post the sizes tomorrow morning.

All the tires are different or all the wheels are different? I'm confused.........

How is that possible?? LOL