Wheels: Larger means greater unsprung weight and matching tires means less sidewall to absorb road defects. I personally wouldn't go for anything lower than an aspect ratio of 40. 17" wheels are sufficiently large for aesthetics and will give you a wide variety of tire choices without disrupting the handling characteristics negatively
Nov 10th, 2013
A larger tire is generally wider than the one it is replacing. If you have a 205/50-15 tire, a wider tire might be a 225/45-15 tire. You cannot drastically change the width of the tire without also installing a wider wheel.
Larger Diameter Tire
A larger tire can also be a tire that has a larger diameter, which means that the outer dimensions of it are larger. If you have a 15-inch wheel and tire, a larger tire would be 16 or 17 inches. You must install larger diameter wheels if you are installing a larger diameter tire