means of a dial gauge 22 fixed to the measuring stand 24 fig7 shows the runout curve solid line of the side 2 a thus measured and a similar runout curve dotted line for another wheel bearing assembly as a comparative example which will be described later both curves have a frequency of four per rotation of the rotor and thus have four crests local maximums and troughs local minimums the maximum variation in one cycle interval of the runout curve and the maximum variation in the entire 360 u00b0 interval are 25 u03bcm and 35 u03bcm respectively which are smaller than standard values for these parameters i e 30 u03bcm and 50 u03bcm respectively as shown the difference between the largest and smallest local maximums is 10 u03bcm while the difference between the largest and smallest local minimums is 15 u03bcm thus these values are far smaller than 30 u03bcm which is a standard value for these parameters the arrows in fig7 show the positions of the wheel mounting bolts 7 which correspond to the positions of the crests of runout of the side 2 a fig8 is a graph showing the maximum runout variations when runout was measured with the brake rotor 5 having runout characteristics shown in fig7 mounted on the flange 2 of the wheel bearing assembly and when it was measured with not only the brake rotor but the wheel hub 14 mounted on the side 5 b of.