Quote (BB_MelloYello @ 28 Oct 2016 19:56)
Anyone with any car knowledge know why my awd car has different size tires for front and rear?
Ordering winter tires and not sure if I could just get all 4 the same size
There are specific tolerances for this
Most AWD systems need the wheels to be the same size. You can and will cause major damage to your car if you don't. That being said a manufacturer can create an awd system (like "sports cars") that is designed to have wheels of different sizes, however you must go with wheels that have the same ratios as the stock wheels in that case.
If you are driving an awd car use the manufacturer recommended sizes, its easy to google.