| 摘要 |
A heavy-duty tire comprises two rows of middle blocks (11). The ground contacting face (S) of each middle block is defined as being surrounded with an axially inner longitudinal edge (14i), an axially outer longitudinal edge (14o), a first-side transverse edge (14a) and a second-side transverse edge (14b). The two transverse edges (14a and 14b) are substantially straight and substantially parallel with each other and inclined with respect to the tire axial direction. The axially inner longitudinal edge (14i) is nonlinear and has an axially inwardly protruding first-side protruding point (15a) and second-side protruding point (15b), and an axially outwardly denting part (16) therebetween. The axially outer longitudinal edge (14o) is nonlinear and has axially outwardly protruding first-side protruding point (20a) and second-side protruding point (20b), and an axially inwardly denting point (21) therebetween. The circumferential distances (Lia, Lib, Loa and Lob) between the protruding points (15a, 15b, 20a and 20b) and the adjacent circumferential ends (Pia, Pib, Poa and Pob) of the longitudinal edges (14i and 14o) are 5 to 15% of the circumferential length (Li, Lo) of the longitudinal edges (14i and 14o).
|
