There's technically rims in every size.
15
16
17
18
19
20
21
22
23
24
But the evens are the most common and more widely used. And I'd agree that 18's would be the largest you'd get if you wanted the "aggressive" look. But if you're trying to be showy, 20's are ehh, 22's are mmmmm, 24's are bammm!
The tires themselves run nice. But they cost an arm and a leg. I blew a tire on the free way cause of some nail, cost me $200ish bucks to get one new tire from Discount Tire.
Mainly because of supply and demand. They had one tire with those specs left, I HAD to have it. So, had to pay for it. Lol.