https://apexwheels.com/fitment-guide...reet-and-track
tire size is as follows;
- 225 is the width of the tire.
- 45 is the aspect ratio of the sidewall. so the sidewall length is 45% of the width of the tire. 225 * .45
- 17 is the diameter of the wheel.
the "Standard Rim: 7 1/2 J" is just saying that the standard with wheel for that tire size is 7 1/2. But that's not set in stone, you have wiggle room with the width of wheels and sizes of tires that you can mount to them.