Has anyone out there used these tires. If so what is the actual tread width? After mini tubing my car, I now have 14" of room to fill. Tryied a set of M/T sportmans. 29x12.5 by 15. With these tires the tread is only 10 inches. Which is ok, but would like to know what's out there for a 15 inch rim, with 28 to 29" tall tire. Thanks