I know this is going to sound like a super dumb question to people who really know wheel fitment, but bear with me please because I am just not grasping this.
I'm shopping around for a second wheel set for my not-yet-in-my-driveway 2020 Levorg. OEM on this car is 225/45R18, rims are 18x7.5 with an offset (they call it inset here!) of 55.
The fenders are pretty tight on the Levorg and I don't want to inch up or down, but I was thinking...maybe go just a little wider? And sure enough, on a couple of the wheel shopping sites I have checked out, they are offering 18x7.5 or 18x8 options.
But the thing I can't wrap my brain around is that the tire size for both is the same. So I was looking at some of the tire manufacturer's pages and sure enough there is a pretty serious width range for tires, like up to two inches.
So how does that actually work? I don't work with tires so I can't understand how, if you put the tire on a wider rim, it doesn't flatten it out and reduce overall diameter. But all of the calculator sites I am looking at show that the rotational stuff is all the same.
Also is there any disadvantage to putting the same size tire on a slightly wider rim like this?
Thank you smarter people.