The tyres in size 255/40 R17 are designed for cars with high performance. Number 255 is the tyre's tread width in millimetres. The next number is a designation of a tyre's profile height in percentage which amounts 40% out of 255 millimetres of the tyre's tread width. The "R" in third position denotes the radial construction of the tyre. Number 17 at the end of the size is the diameter of the wheel's rim in inches on which 255/40 R17 tyre can be installed. Are you searching for a suitable equipment for your car? Check out our offer of tyres in size 255/40 R17.