The Pirelli Scorpion STR is a premium Highway All-Season tire that delivers stability, traction and ratings appropriate for today's light trucks. They adapt their performance to the needs of crossover vehicles, SUVs and light duty pickup trucks. The Scorpion STR's tread compound is molded into two similar, but slightly different symmetric tread designs. Tires featuring the North American tread pattern are identified as Scorpion STR A, and those featuring the European tread pattern are indentified as Scorpion STR tires.