Nokian Armor Gard 2 can be fitted to a wider variety of excavators due to a new 11.00-20 size. The tire has 25 percent more vertical rigidity than its predecessor. Roads tend to be paved in city excavation sites, as well as in the transits between them; both can cause premature wear on excavator tires. A wide tread enables lower surface pressure, which means the tire wears out slower, the company says. The tire has 12 percent more rubber in the tread compared to the previous model.