| 摘要 |
The present invention comprises: an attachment body (11) which is attached to an axle; a ring member (14) comprising an inner cylinder body (12) which is fitted to the exterior of the attachment body (11), and an outer cylinder body (13) which surrounds the inner cylinder body (12) from the outside in the tyre radial direction; and a plurality of connecting members (15) which are arranged between the inner cylinder body (12) and the outer cylinder body (13) along the tyre circumferential direction, and connect both of the cylinder bodies (12, 13) to one another. The plurality of connecting members (15) and at least part of the ring member (14) are integrally formed from a synthetic resin material which has a flexural modulus of at least 300 MPa as measured by a three-point bending test in compliance with ISO 178, and has a fracture strain of at least 3% as measured by a tensile test in compliance with ISO 527-1 and 2. |
