What effect do road and weather conditions have on rolling resistance?
The texture and firmness of the road surface also affect rolling resistance. The softer or rougher the surface, the greater the rolling resistance. Asphalt, for example, is softer and will produce greater rolling resistance than concrete. Rain or snow on the road surface will also increase rolling resistance. The internal friction of a tire is decreased with increased operating temperature. Therefore, rolling resistance will be less during warmer weather conditions. Wheel and axle alignment affects tire wear and rolling resistance. Proper alignment of the drive and trailer axles is just as important as the steering axle. Because of the potential for so many combinations of misalignment, it is very difficult to demonstrate the effect on vehicle performance. However, poorly maintained alignment could typically result in the loss of several percent in fuel economy and cause premature tire wear.
