RAM Cargo Van 2014 Owner's Manual page 636

634 IF YOU NEED CONSUMER ASSISTANCE
DEPARTMENT OF TRANSPORTATION UNIFORM
TIRE QUALITY GRADES . . . . . . . . . . . . . . . . .641
▫ Treadwear. . . . . . . . . . . . . . . . . . . . . . . . . . .641
▫ Traction Grades . . . . . . . . . . . . . . . . . . . . . . .642
▫ Temperature Grades. . . . . . . . . . . . . . . . . . . .642