A method for determining a thickness of at least one tire of a vehicle during an operation of the vehicle, the at least one tire comprising a tire wall having an inner side and an outer side opposite the inner side and the at least one tire comprising a tread having a tread pattern with an inner side and an outer side opposite the inner side, the method comprising the steps of: - transmitting a first beam of ultrasonic waves having a first phase by an ultrasonic transmitter arranged on the inner side, the first beam of ultrasonic waves being transmitted through the tire wall, - receiving a second beam of ultrasonic waves having a second phase by an ultrasonic receiver arranged on the inner side, the second beam of ultrasonic waves being reflected through the tire wall by a surface arranged outside of the at least one tire, - determining at least one first parameter selected from a time period between transmitting the first beam of ultrasonic waves and receiving the second beam of ultrasonic waves and a phase shift between the first phase and the second phase, - determining a thickness of the at least one tire based on the at least one determined first parameter, characterized in that the method further comprises the steps of: - receiving a third beam of ultrasonic waves having a third phase by the ultrasonic receiver arranged on the inner side of the tire wall, the third beam of ultrasonic waves being reflected through the tire wall by the inner side of the tread pattern, - determining at least one second parameter selected from a time period between transmitting the first beam of ultrasonic waves and receiving the third beam of ultrasonic waves and a phase shift between the first phase and the third phase, - determining a thickness of the tread pattern based on the at least one determined first parameter and the at least one determined second parameter. - transmitting a first beam of ultrasonic waves having a first phase by an ultrasonic transmitter arranged on the inner side, the first beam of ultrasonic waves being transmitted through the tire wall, - receiving a second beam of ultrasonic waves having a second phase by an ultrasonic receiver arranged on the inner side, the second beam of ultrasonic waves being reflected through the tire wall by a surface arranged outside of the at least one tire, - determining at least one first parameter selected from a time period between transmitting the first beam of ultrasonic waves and receiving the second beam of ultrasonic waves and a phase shift between the first phase and the second phase, - determining a thickness of the at least one tire based on the at least one determined first parameter, - receiving a third beam of ultrasonic waves having a third phase by the ultrasonic receiver arranged on the inner side of the tire wall, the third beam of ultrasonic waves being reflected through the tire wall by the inner side of the tread pattern, - determining at least one second parameter selected from a time period between transmitting the first beam of ultrasonic waves and receiving the third beam of ultrasonic waves and a phase shift between the first phase and the third phase, - determining a thickness of the tread pattern based on the at least one determined first parameter and the at least one determined second parameter.