Tyres in size 275/40 R21 are designed for cars of a sports character. The first number denotes tyre's tread width and it is expressed in millimetres. The next number is tyre's profile height expressed in percentage (40% of 275 millimetres of the tyre's tread width). The "R" on the last but one position means that the tyre has been produced with the use of the radial construction. Next to the letter, there is a designation of the diameter of the wheel's rim (in inches) on which the tyre can be installed. Look through our offer of tyres in size 275/40 R21 and choose the equipment for yourself.