I did the calculation in Freedom Units and converted to grams per km. Assuming tires last 60,000 miles or 100,000km and got 0.1 gm/km. So matches your analysis closely.
Notable I put 60,000 miles on my cars tires since I bought it. They are due for replacement kind of whenever.
Notable I put 60,000 miles on my cars tires since I bought it. They are due for replacement kind of whenever.