Three commercial truck tires produced by Yokohama Tire Corp. have been approved by the U.S. EPA SmartWay program, which promotes cleaner, more efficient truck technologies. According to the EPA, Yokohama’s RY617 steer tire, 703ZL drive tire (shown), and RY587MC2 trailer tire met the SmartWay program’s criteria regarding low rolling resistance; as a result, the tires can be used on trucks that are SmartWay-certified. The RY617 is a highway line/haul all-position tire incorporating a five rib tread design with more than 6000 sipes. The 703ZL features a 1-in (25-mm) deep tread and is said to offer the lowest rolling resistance in its category. The RY587MC2 is for long-haul trailer applications.