A tire system is configured to enable a general-purpose communication device to establish data communication with a tire-side device, thereby enabling transmission of data indicating a tire-related condition from the tire-side device to the general-purpose communication device. The general-purpose communication device acquires the tire-related condition, and reports the tire-related condition to the user via a notification unit. Based on the above, it is possible to report the tire-related condition via the general-purpose communication device based on the communication between the general-purpose communication device and the tire-side device.