This is my second set of Arc 8. Had 19s back in 2015.
Continental Extreme Contact Sports are the tires being used.
I went with the following
18x9 ET30(added a 5mm spacer to make it ET25 and move the tire away from strut as well) 255/40R18
18x10 ET25 295/35R18
There is NOTHING wrong with quality spacers and lug bolts.
