New tires today got bolted onto my first 200. The truck is at stock height. The fellow who assisted me at the local Les Schwab told me their 275/70/18 Mazama Open Range (built by Sumitomo) has a diameter of 33.4" and width of 11.1". I was pleased that they barely fit with zero rubbing at full turn angles. It appears this size is a maximum diameter/width for a stock 200 without requiring wheel well plastic trimming or mud flap removal.
Edit: Today I noticed light rubbing with wheel cranked while moving in reverse, coming from front of tire.
The light rubbing was in fact happening behind the front tires. So I removed the front mud flaps and no more rubbing. I'm really happy with these tires, including their size.