A tyre identifying method comprising measuring the rotational speed of each of the four tyres fitted to the wheels of a vehicle; calculating a ratio of front wheel rotation speed to rear wheel rotation speed from the measured value; and identifying the kind of tyre fitted by comparing the calculated front-rear wheel ratio with a function of speed and front-rear wheel ratio prepared on the basis of data from, the tyre whose kind is previously known. Utilisation can be made of the means for measuring the rotation of tyre such as ABS which is equipped on the vehicle control device, thus requiring small initial cost.