Quote Originally Posted by Bio248 View Post
both 18/19s will increase your wheel gap. to what degree, only you will be able to judge as it's an opinion.

i can't stand cars with bigger wheels that aren't lowered, but others heavily disagree. it's all on your taste. 18s are usually a good option and what most people stick with. 19" tires are kinda expensive.
How is wheel gap increased if the rolling diameter is kept the same?

225/55/17's are 26.744" in diameter
245/45/18's are 26.681" in diameter
245/40/19's are 26.716" in diameter

The wheel gap would be virtually the same.