RAM CHASSIS CAB 2015 Owner's Manual page 568

566 IF YOU NEED CONSUMER ASSISTANCE
DEPARTMENT OF TRANSPORTATION UNIFORM
TIRE QUALITY GRADES . . . . . . . . . . . . . . . . .573
▫ Treadwear. . . . . . . . . . . . . . . . . . . . . . . . . . .573
▫ Traction Grades . . . . . . . . . . . . . . . . . . . . . . .573
▫ Temperature Grades. . . . . . . . . . . . . . . . . . . .574