I am still thinking the tire thing thru. For better handling, would it make more since to have the same size tires all the way around? Wouldn't this help the understeer? Just another question. Hate the buy the wrong rims the first time.

as long as the car is "balanced" properly, I don't think it matters, many ultra-high performance factory cars have different size tires front to rear, note 'vette's n Vipers for starters.