I tried to summarize the info below:
i3s and i3 with sport package:
Since there's a stock 20'' wheel, need to purchase a new 19" wheelset with an offset of 28mm.
[Option #1]: $2k for a BMW set here. Wheel size 5x19, tire is a Bridgestone Blizzak LM500, Front / Rear: 155/70R19 88Q XL includes...