Wheel Size Question
 

Hi, I am currently running the Stock 370z Sports-package wheels which are 19x9.0 and 19x10 which comes with the 245/40WR19 (front) and 275/35WR19 (rear) tires. I was thinking about purchasing aftermarket wheels which are 19x9.5 and 19x10.5. I was just wondering would they fit my current tires or will I need to purchase new tires and what are the benefits of increasing the width of the tires? Would it provide more grip at the cost of higher mpg? What exactly does increasing or decreasing the wheel diameter/width do to the car? Sorry if this is a noob question but I just want to make sure I make the right decision. Thanks guys.

^ :( anyone?

You could keep the same tires, they will look a little bit stretched. Wider tires on the wider wheels offer more corner traction (more grip) but come with the potential price of tramlining (following the groves in the pavement).

yes tires will work. just like Chrisslicks said, a little stretch, but will be fine.