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There are various losses associated with passenger vehicle that affect its fuel economy as it is being operated. These losses include losses at engine, driveline, aerodynamic and rolling losses. While engine, driveline and aerodynamic losses are inherent with the vehicle due to large number of parts that are assembled together, rolling loss is associated with the vehicle tires and it is the only part of the vehicle that comes in contact with the road surface. The rolling resistance of inflated tires is an important component of rolling resistance to vehicle motion and contributes to vehicle fuel consumption. Hence the effect of tire parameters such as inflation pressure, speed and load are the subject of much current interest. Also effect of type of inflation fluid on tire performance is a need of investigation.