"As we continue the national and global discussion of conserving energy, fossil fuels and other natural resources, this technology is a solution that is making a difference today." [xfloat=right]http://www.cleanmpg.com/photos/data/501/Trailer_with_Single_Wides_installed.jpg[/xfloat]Wayne Gerdes – CleanMPG – Mar. 25, 2009 Oak Ridge National Lab's four-year study compares Michelin(R) X One(R) tires to duals. Weight savings of up to 1,200 pounds per rig can be exploited for additional load with a smaller increase in FE. One less load for every 50 trips is a 2% savings just on the weight reduction alone. Greenville, SC. -- A 383-page report made available last week by the Department of Energy's Oak Ridge National Laboratory confirms that Single Wide truck tires are much more fuel efficient than duals on heavy trucks. More than 700,000 real-world miles were driven by six instrumented tractors and 10 trailers over the course of the four-year test. "If fleets and owner-operators needed more proof that wide singles can save fuel costs, look no further," said David Stafford, chief operating officer of Michelin Americas Research Company (MARC). "This real-world field testing confirms what our engineers and designers have said since we launched the Michelin(R) X One(R) nine years ago - that replacing duals with wide single tires not only reduces rolling resistance and saves energy, but also reduces the amount of CO2 we put into the atmosphere." Data collected during the tests includes instantaneous fuel consumption, speed, acceleration, gear, location, time of day and grade. Half of the tractors were outfitted with Michelin X One single wide tires while the other half where equipped with standard dual tires. Half of the trailers were outfitted with Michelin X One single wide’s, two with standard dual tires, and three with dual retread tires. Oak Ridge researchers found significant fuel efficiency improvement over dual tires when wide singles were in use - 6 percent overall and 10 percent with fully-loaded tractor-trailers. "Our tests have found wide single tire technology to be more fuel efficient in a variety of real-world conditions," said Bill Knee, director of vehicle safety research at Oak Ridge National Laboratory.