Patent ID: 8640750

Claim:
A pneumatic tire comprising a tread portion provided with a pair of axially outermost shoulder main grooves extending continuously in the tire circumferential direction; at least one crown main groove extending continuously in the tire circumferential direction and disposed between the axially outermost shoulder main grooves; a pair of shoulder land portions extending between the axially outermost shoulder main grooves and tread edges; and a pair of crown land portions extending from the axially outermost shoulder main grooves to the adjacent crown main groove or grooves, wherein each said shoulder land portion is circumferentially divided into a plurality of shoulder blocks divided by shoulder axial grooves extending across the entire width of the shoulder land portion, and the shoulder axial grooves include: first shoulder axial grooves each having a groove width of not less than 3.5 mm along its entire length; and second shoulder axial grooves each comprising a main part having a groove width of not less than 3.5 mm, and a sipe-like part having a groove width of 0.5 to 2.0 mm and formed on the axially inside of the main part continuously from the main part and opened into the axially outermost shoulder main groove, wherein the first shoulder axial grooves and the second shoulder axial grooves in each said shoulder land portion are arranged alternately one by one in the tire circumferential direction, wherein each said crown land portion is circumferentially divided into a plurality of crown blocks by crown axial grooves extending across the entire width of the crown land portion, and the crown axial grooves include: first crown axial grooves each having a groove width of not less than 2.0 mm along its entire length; and second crown axial grooves each comprising a main part having a groove width of not less than 2.0 mm, and a sipe-like part having a groove width of 0.5 to 2.0 mm and formed on the axially inside of the main part continuously from the main part and opened into the crown main groove, wherein the first crown axial grooves and the second crown axial grooves are arranged alternately one by one in the tire circumferential direction, wherein each said crown land portion is provided between every two circumferentially-adjacent crown axial grooves with a narrow crown circumferential groove so as to axially divide the crown block into two, wherein each of the first and second crown axial grooves is a bent groove made up of: a part extending from the crown main groove to a bent point while inclining toward one circumferential direction; and a part extending from the bent point to the shoulder main groove while inclining toward the other circumferential direction, wherein the bent point is located between the narrow crown circumferential groove and the shoulder main groove, and wherein said shoulder blocks and said crown blocks are each provided with a plurality of zigzag sipes.