Tire rolling resistance is closely related to overall vehicle fuel economy or range, and it’s common that vehicle manufacturers require tire rolling resistance improvements to help optimize fuel economy/cruising range. As EVs gain more share of the global vehicle parc, optimizing range has made rolling resistance even more critical. Current rolling resistance testing methods only focus on tire performance at an ambient temperature of 24℃ or 25℃, but real-world applications span a much broader range of operation, leading to significant RRc differences. This paper combines data analysis and experimental methods to explore the rolling resistance of tires at other temperatures.

• Summary of evolving industry expectations for rolling resistance performance
• Overview of the effect of rolling resistance on EVs
• Review of current rolling resistance test methods and their differences
• Overview of the study conducted on a variety of tires within different temperature ranges
• Effects of cold temperature on rolling resistance and fuel efficiency