I have an 06 Maxima SE. I have replaced the stock 18" wheels with 20's but now that we are getting into winter I want to put some studded tires on my car. I want to go with smaller "cheap" wheels. How small of a wheel will fit over the rotor & calipers? I am hoping to fit 15 or 16" rims since they will be cheaper for both the rims and tires.