Set of 4 Pirelli Cinturato P7 All Season + 225/45/R18 driven less than 500 Km due to early return of my lease. Very smooth and quiet ride compared to run flats (just a need a repair kit at $30). Exact size for any BMW 3 series with 18" wheels. Tired rated 5/5*. Thread warranty is 110,000 Km. Depth thread 11/32 (new). Price for new tire is $188.00 each at CT or Costco before tax. Great deal for new tires.