wheel rim 17"

Hi everyone, I am thinking about buying a mazda 6 2014, GS model, but the wheels will be 17" only, if i want to get a 19" wheel, do i need to adjust the suspension or i can simply install the 19" wheel Thanks

Anyone have one stock MazdaSpeed Protege Racing Hart wheel for sale? Or know where I can find one in the New England area? Hit a block of wood in the road...crack...