The tyres in size 255/35 R19 are installed in passenger cars, especially in those of a sports character. Number 255 is the exact designation of the tyre's tread width (in millimetres). The next number in the size is concerned with the tyre's profile height (which amounts 35% out of 255 millimetres). The capital "R" in the last but one position is the information about the radial construction of the tyre. The last number in the size is a designation of a diameter of the wheel's rim (in inches) which can be installed with the tyre in size 255/35 R19. You're welcome to do the shopping.