| 摘要 |
PURPOSE:In a pneumatic tyre having an outer peripheral portion constituted by a number of vane lug parts and small lug parts arranged between the vane lug parts, to reduce vibration of the tyre by specifying lug pitches between the vane lug parts and spacings between the small lug parts. CONSTITUTION:In a pneumatic tyre 3 for agriculture to be mounted on a wheel 2, an outer peripheral portion 19 constituted by a tread surface 17 and outer side surfaces 18 of right and left side wall portions 15 is provided with a number of lugs 20 arranged at pitches R in the peripheral direction and integral with a tyre body 10. The lugs 20 comprise vane lug parts 21 disposed at vane pitches L in the peripheral direction and small lug parts 22 arranged at lug spacings S between the vane lug parts 21, where at least one of lug pitches R between the vane lug parts 21 is established at a value different from another so that the ratio of the maximum pitch/the minimum pitch ranges from 1.2-1.8. Further, the spacing S4 between each vane lug part 21 and the small lug part 22 arranged on the rear row side thereof is set up more widely than another spacing S. |
