What do you mean by the size and number of the car tires?

Answer:

The tire specifications indicate that the general format is this, 225/50R17, 94V, and the meanings of these numbers and letters are, respectively:225 represents tread width, the unit is mm, the width of the general tire is between 145 and 285mm, the interval is 10mm;

R is the abbreviation of Radial in English, which means that the tire is a radiation layer structure, and the 15 is the outer diameter of the rim, in inches.94V is the maximum load and maximum speed of a tire94 means the maximum weight of the tire is 670 kilogramsV says the maximum speed the tires can hold is 240 kilometers

The 50 is flat, the tire wall height and tread width ratio of 50, representing 50%, general tire flat than in 30% - 80%, under normal circumstances, ordinary cars should not use flat than >75% tires, luxury cars and high performance sports car than the <60% recommended flat tire;