| 摘要 |
A heavy-duty rib type pneumatic radial tire for improving the structure of the sipe is provided to prevent the irregular offset wear of rib by heighten the rigidity of the rib end part and maintaining the uniform earth contact pressure. As a heavy-duty rib type pneumatic radial tire for improving the structure of the sipe comprises a plurality of ribs and the groove located on surface the thread(10) and a plurality of sipes formed in the rib either side, a plurality of kerves formed within the unit pitch of the rib, the mutual interspacing deeply and characterizes differently each other.
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