What backspacing and tire size for 18" wheels on an E36?

[TeamPSI]

Im about to grab a set of wheels from a local distributor, and Im wondering what backspacing is required, and roughly what tire size I can fit. I have no plans of lowering the car anytime soon.

[OkieM3]

Check my thread below about my hyperblack adr wheels. I got 18X9.5 on my rear with 35 offset. I would not recommend this as lots of fender rolling is needed. I would go with something like 43 offset on the rear if I could. Unfortunately ADR doesn't make that offset in the wheels I got.