| 摘要 |
A tire having an air tunnel at a shoulder unit is provided to secure uniform wear of the tire by contacting equally the tire to the ground in traveling and to expand the life span of the tire. A tire has a plurality of ring-shaped air tunnels(T), which are arranged circumferentially on a shoulder unit(2) right above an under tread unit(1). The air is filled airtightly in the air tunnel by forming the air tunnel into a ring without the end. Accordingly, internal pressure is generated in the air tunnel by forcibly inserting the air into the air tunnel. Both shoulder units of the tire keep elasticity tightly by plural air tunnels inflated with the internal pressure. Therefore, optimal uniform contact of the tire is secured by the inflated shoulder units.
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