RETIGHTENING NOTIFICATION APPARATUS

A retightening notification apparatus include: a travel distance acquiring part that acquires a distance traveled after attachment, which is a distance that a vehicle traveled from when a wheel of a tire was attached to the vehicle by tightening a fastening component such as a nut or a bolt, to the present moment; and a notification control part that provides notification prompting retightening of the fastening component if the acquired distance traveled after attachment becomes equal to or greater than a retightening distance, which is determined in accordance with a state of use of the fastening component.