Tire pressure measuring system for vehicles (F 1, F 2, F 3), such as passenger vehicles, commercial vehicles, tractors, semi-trailers and/or trailer vehicles, - wherein each wheel (R 1,...,R 18) of a vehicle (F 1, F 2, F 3) has a tire pressure sensor (S 1,...,S 18), a transmitter and a battery, and - wherein the vehicle (F 1, F 2, F 3) is equipped with an electronic, radio receiver module (M 1, M 2, M 3) which is designed to wirelessly receive tire pressure measured values (D 1,...,D 18) measured by the tire pressure sensors (S 1,...,S 18), - wherein in the case of at least two vehicles (F 1, F 2, F 3) arranged next to one another, one behind the other or one above the other, the tire pressure measured values (D 1,...,D 18) of all wheels (R 1,...,R 18) of the at least two vehicles (F 1, F 2, F 3) can be received via radio by means of the receiver modules (M 1, M 2, M 3) associated with the vehicles (F 1, F 2, F 3), provided that the arrangement of the vehicles (F 1, F 2, F 3) as well as the arrangement of components of the vehicles (F 1, F 2, F 3) and the receivability of the tire pressure measured values (D 1,...,D 18) make this possible without radio shadowing, - wherein the receiver module (M 1, M 2, M 3) of the relevant vehicle (F 1, F 2, F 3) can be connected at least temporarily to a vehicle-external electronic database by means of a bidirectional radio connection (30, 32, 34), and - wherein a vehicle identification value (I 1, I 2, I 3) assigned to the relevant vehicle (F 1, F 2, F 3), as well as the tire pressure measured values (D 1,...,D 18) of the wheels (R 1,...,R 18) that correspond to this vehicle (F 1, F 2, F 3) and identification values (J 1,...,J 18) of the respective tire pressure sensors (S 1,...,S 18) of the at least two vehicles (F 1, F 2, F 3) can be transferred to the vehicle-external database by means of the bidirectional radio connection (30, 32, 34), characterized in that - the vehicle identification values (I 1, I 2, I 3), the tire pressure measured values (D 1,...,D 18) and the identification values (J 1,...,J 18) of the tire pressure sensors (S 1,...,S 18) from the vehicle-external database can be queried and received at least by the receiver modules (M 1, M 2, M 3) by means of the respective bidirectional radio connections (30, 32, 34). - wherein each wheel (R 1,...,R 18) of a vehicle (F 1, F 2, F 3) has a tire pressure sensor (S 1,...,S 18), a transmitter and a battery, and - wherein the vehicle (F 1, F 2, F 3) is equipped with an electronic, radio receiver module (M 1, M 2, M 3) which is designed to wirelessly receive tire pressure measured values (D 1,...,D 18) measured by the tire pressure sensors (S 1,...,S 18), - wherein in the case of at least two vehicles (F 1, F 2, F 3) arranged next to one another, one behind the other or one above the other, the tire pressure measured values (D 1,...,D 18) of all wheels (R 1,...,R 18) of the at least two vehicles (F 1, F 2, F 3) can be received via radio by means of the receiver modules (M 1, M 2, M 3) associated with the vehicles (F 1, F 2, F 3), provided that the arrangement of the vehicles (F 1, F 2, F 3) as well as the arrangement of components of the vehicles (F 1, F 2, F 3) and the receivability of the tire pressure measured values (D 1,...,D 18) make this possible without radio shadowing, - wherein the receiver module (M 1, M 2, M 3) of the relevant vehicle (F 1, F 2, F 3) can be connected at least temporarily to a vehicle-external electronic database by means of a bidirectional radio connection (30, 32, 34), and - wherein a vehicle identification value (I 1, I 2, I 3) assigned to the relevant vehicle (F 1, F 2, F 3), as well as the tire pressure measured values (D 1,...,D 18) of the wheels (R 1,...,R 18) that correspond to this vehicle (F 1, F 2, F 3) and identification values (J 1,...,J 18) of the respective tire pressure sensors (S 1,...,S 18) of the at least two vehicles (F 1, F 2, F 3) can be transferred to the vehicle-external database by means of the bidirectional radio connection (30, 32, 34), characterized in that - the vehicle identification values (I 1, I 2, I 3), the tire pressure measured values (D 1,...,D 18) and the identification values (J 1,...,J 18) of the tire pressure sensors (S 1,...,S 18) from the vehicle-external database can be queried and received at least by the receiver modules (M 1, M 2, M 3) by means of the respective bidirectional radio connections (30, 32, 34).