Tire testing method

Provided is a tire testing method capable of suppressing damage to a testing machine. This test method comprises the steps of: penetrating a shaft-shaped member (10) through a tread (52) from a tread surface (54) of a tire (50); a tire (50), the tread (52) of which has a shaft-like member (10) inserted therethrough, runs on a metal drum (2). The shaft-like member (10) is provided with: a main body section (12); a head part (14) which is provided at one end (12a) of the main body part (12) and which protrudes further outward in the radial direction than the outer peripheral surface (12c) of the main body part (12); and a tapered portion (16) provided at the other end (12b) of the main body portion (12) and abutting against the tread surface (54). The head portion (14) has: a contact surface (14b) that comes into contact with the tread surface (54) in a state in which the main body portion (12) passes through the tread (52); and an end surface (14c) located on the opposite side of the abutting surface (14b), at