You'll need to specify the diameter you're going for (17, 18", etc.) along with desired width (stock, wide as possible, etc.). backspacing requirements will vary front to rear if you're looking for maximum width. More info required as there are just too many variables.
The bolt spacing on our cars is 120.65 mm so I wouldn’t try to fit on a 120 mm wheel. It may fit on but it won’t be proper. Keep them both the same. Those widths will work but you will have to be mindful of the backspace, likely 4.5 inches in the front and 5.5 inches in the back. Check out this thread there’s probably some useful information based on the wheel specs you have