The Double Coin RR680 tire has met the requirements of the U.S. Environmental Protection Agency’s (EPA) SmartWay program. EPA has verified that the RR680 has met low rolling resistance tire performance criteria for new tires in both steer and drive positions. Double Coin’s RR680 joins five other tire models from the company, including in the OptiGreen Series FR605, FD405, FT105, FT125 and FD425.