The dynamic frictional properties of the replacement brake disc/drum can be regarded as similar to those of the original brake disc/drum, provided the values attained in relation to the mean fully developed deceleration at the same operating pressures or control forces in the region of the upper 2/3 of the curve generated do not deviate by either +- 10 per cent or +- 0.4 m/s² from those of the original brake disc/drum.
The dynamic frictional properties of the replacement brake disc/drum can be regarded as similar to those of the original brake disc/drum, provided the values attained in relation to the mean fully developed deceleration at the same operating pressures or control forces in the region of the upper 2/3 of the curve generated do not deviate by either +- 10 per cent or +- 0.4 m/s² from those of the original brake disc/drum.