The effects of the load, inflation pressure and rotating speed on the rolling resistances of 195/65R15 and 205/55R16 tires from different manufacturers were experimentally investigated.

试验研究轮胎负荷、充气压力和旋转速度对国内外不同轮胎生产企业195/65R15和205/55R16轮胎滚动阻力的影响。

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In other words, the Wall Street equivalent of changing the oil and rotating the tires.

WSJ: At J.P. Morgan, Managing the Unmanageable