| CPC B60C 11/13 (2013.01) [B60C 11/0306 (2013.01); B60C 11/1259 (2013.01); B60C 11/1263 (2013.01); B60C 11/1281 (2013.01); B60C 11/1369 (2013.01); B60C 2011/0348 (2013.01); B60C 2011/0351 (2013.01); B60C 2011/0353 (2013.01); B60C 2011/0355 (2013.01); B60C 2011/036 (2013.01); B60C 2011/0362 (2013.01); B60C 2011/0365 (2013.01); B60C 2011/0367 (2013.01); B60C 2011/0369 (2013.01); B60C 2011/0372 (2013.01); B60C 2011/1213 (2013.01); B60C 2011/1231 (2013.01)] | 16 Claims |
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13. A pneumatic tire comprising:
a pair of circumferential main grooves extending in a tire circumferential direction, and
a pair of shoulder land portions and a single center land portion defined and formed by the circumferential main grooves,
the center land portion comprising a plurality of center narrow shallow grooves extending through the center land portion in a tire width direction,
a groove depth H21 of the center narrow shallow groove being in a range 0.025≤H21/Hg≤0.150 with respect to a maximum groove depth Hg of the circumferential main groove,
the center land portion comprising a plurality of center narrow shallow grooves extending through the center land portion in a tire width direction and connected to the pair of circumferential main grooves, and
the pneumatic tire being a construction vehicle tire; wherein
the center land portion comprises center bent grooves having a bent shape or a curved shape and being open to the circumferential main groove at at least one end portion,
a groove depth H22 of the center bent grooves is in a range 0.50≤H22/Hg≤0.90 with respect to the maximum groove depth Hg of the circumferential main groove,
the center bent grooves have a linear shape, an arc shape, or an S shape, and
an extension length L22 of the center bent grooves in the tire width direction is in a range 0.45≤L22/Wb2≤0.65 with respect to a ground contact width Wb2 of the center land portion.
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14. A pneumatic tire comprising:
a pair of circumferential main grooves extending in a tire circumferential direction, and
a pair of shoulder land portions and a single center land portion defined and formed by the circumferential main grooves,
the center land portion comprising a plurality of center narrow shallow grooves extending through the center land portion in a tire width direction,
a groove depth H21 of the center narrow shallow groove being in a range 0.025≤H21/Hg≤0.150 with respect to a maximum groove depth Hg of the circumferential main groove,
the center land portion comprising a circumferential narrow groove extending in the tire circumferential direction, and
a groove depth H23 of the circumferential narrow groove being in a range 0.70≤H23/Hg≤0.90 with respect to the maximum groove depth Hg of the circumferential main groove.
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15. A pneumatic tire comprising:
a pair of circumferential main grooves extending in a tire circumferential direction, and
a pair of shoulder land portions and a single center land portion defined and formed by the circumferential main grooves,
the center land portion comprising a plurality of center narrow shallow grooves extending through the center land portion in a tire width direction,
a groove depth H21 of the center narrow shallow groove being in a range 0.025≤H21/Hg≤0.150 with respect to a maximum groove depth Hg of the circumferential main groove,
the center land portion comprising center bent grooves having a bent shape or a curved shape and being open to the circumferential main groove at at least one end portion,
a groove depth H22 of the center bent grooves being in a range 0.50≤H22/Hg≤0.90 with respect to the maximum groove depth Hg of the circumferential main groove, and
the center bent grooves comprising a raised bottom portion at an opening portion corresponding to the circumferential main groove.
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