Just slapped 2 sets of Burger 13mm wheel spacers on my X2 running OEM 225/50R18s on OEM 7.5" wheels.
https://burgertuning.com/products/g-...b06615de&_ss=r
Pics don't do the change for the better justice. I wanted to stay with a 'square' setup & didn't want to overstep so I went 13mm. In hindsight one could go 15mm square with zero problems at all IMO. I will eventually be going to about an inch wider 18 tire so still have plenty of room for that.
The kit seems super good quality. Everything fit like a glove. In about 20 min I had all 4 wheels done. Longest time was applying anti-seize on the pieces. I ordered the parts 1 late afternoon & they were at my house less than 24hrs later. Pretty amazing.