Okay, tried going through as much as i can on the wheel post but there's 180 pages and after a week no one has responded sooooo. just want a little verification on wheel size.
2018 IS300 F sport RWD on RSR super downs

Front 19x8.5 +35 235/35/19
Rear 19x9.5 +42-45 265/30/19

Seemed like that seemed a typical sizing but wasn't sure with the superdowns whether being that low will be an issue. right now its not driven much but I could see myself swapping to Coilovers at some point. and it seems any wheels I'm looking at there are plenty of front wheels with that size and offset but not so much with the rear sizing. I would prefer not to use spacers I am seeing a lot of +40 for rear tires and not sure how those would fit. any help would be appreciated. i suck at figuring out wheel specs.