biggest tire for the wheel

i have 15x7 wheels. will i be able to fit a 33x12.5r15 on it or a 32x11.5r15. i really dont want to buy new wheels since i just made my old ones look so good, and i dont want to spend the money.

You need a minimum of an 8" rim for the tires you listed. A 33X10.50R15LT is the largest that will fit on a 7" rim.