For Class C2 and Class C3 the reference pressure Pr is the inflation pressure corresponding to the pressure in kPa or to the pressure index marked on the sidewall.

For class C2 and class C3 the reference pressure Pr is the inflation pressure corresponding to the  DEL indication of the inflation pressure marked on the sidewall as required by paragraph 4.1. of this Regulation.

 a6c0
For Class C2 and Class C3 the reference pressure Pr is the inflation pressure corresponding to the pressure in kPa or to the pressure index marked on the sidewall. a1c0
For Class C2 and Class C3 the reference pressure Pr is the pressure corresponding to the pressure index marked on the sidewall. a0c0