Nitto 420S 255-55r18 - A tread designed by an artist, the Nitto 420S is one of the most beautiful tread designs on the road today. Designed just for trucks and SUVs, the 420S has a non-diretional tread pattern giving you the freedom to rotate them left to right or side to side without having to dismount them, saving you hundreds of dollars in mount and balance and resulting in a longer lasting tire making the Nitto 420S a very economical tire.