Pneumatic tire
Provided is a pneumatic tire in which circumferential narrow grooves are disposed at a tire width direction disposal density of from 0.06 grooves/mm to 0.2 grooves/mm. Width direction narrow grooves include at least one bent portion. The bent portion has a bend angle of not less than 40° and not more than 160°.
1. A pneumatic tire, comprising:
a circumferential main groove; and
a row of small blocks formed by partitioning with a plurality of circumferential narrow grooves and a plurality of width direction narrow grooves that intersect with the circumferential narrow grooves,
the row of small blocks being centered on a tire centerline,
the circumferential narrow grooves being straight grooves and being disposed with a tire width direction disposal density of not less than 0.06 grooves/mm and not more than 0.2 grooves/mm,
the width direction narrow grooves including at least one bent portion, and
a bend angle at the bent portion being not less than 40° and not more than 160°.
2. The pneumatic tire according to claim 1 , wherein a spacing of the width direction narrow grooves is not less than 0.8 times and not more than 1.5 times a spacing of the circumferential narrow grooves.
3. The pneumatic tire according to claim 2 , wherein an apex of the bent portion is located in a central portion region occupying 50% of a tire width direction region of the bent portion.
4. The pneumatic tire according to claim 3 , wherein a groove width of the circumferential narrow grooves is at least 1.0 mm and less than 4.0 mm.
5. The pneumatic tire according to claim 4 , wherein a groove width of the width direction narrow grooves is at least 1.0 mm and less than 4.0 mm.
6. The pneumatic tire according to claim 5 , wherein the small blocks that are adjacent in the tire circumferential direction share a same tire circumferential direction region.
7. The pneumatic tire according to claim 6 , wherein at least any one of the small blocks includes at least one sipe formed therein.
8. The pneumatic tire according to claim 1 , wherein an apex of the bent portion is located in a central portion region occupying 50% of a tire width direction region of the bent portion.
9. The pneumatic tire according to claim 1 , wherein a groove width of the circumferential narrow grooves is at least 1.0 mm and less than 4.0 mm.
10. The pneumatic tire according to claim 1 , wherein a groove width of the width direction narrow grooves is at least 1.0 mm and less than 4.0 mm.
11. The pneumatic tire according to claim 1 , wherein the small blocks that are adjacent in the tire circumferential direction share a same tire circumferential direction region.
12. The pneumatic tire according to claim 1 , wherein at least any one of the small blocks includes at least one sipe formed therein.
13. The pneumatic tire according to claim 1 , wherein the width direction narrow grooves have a same width in the tire circumferential direction as a width of the circumferential narrow grooves in the width direction.
14. The pneumatic tire according to claim 1 , wherein the bend angle at the bent portion is not less than 40° and not more than 110°.
15. The pneumatic tire according to claim 1 , wherein the bend angle at the bent portion is not less than 140° and not more than 160°.
16. The pneumatic tire according to claim 1 , wherein a corner of the bent portion points in a direction parallel to the tire circumferential direction.
17. The pneumatic tire according to claim 1 , wherein a spacing of the width direction narrow grooves is not less than 0.8 times and not more than 1.2 times a spacing of the circumferential narrow grooves.
18. The pneumatic tire according to claim 1 , wherein a groove width of the width direction narrow grooves is at least 1.0 mm and less than 1.9 mm.
19. The pneumatic tire according to claim 1 , wherein the bend angle at the bent portion is not less than 142° and not more than 160°.
20. A pneumatic tire, comprising:
a circumferential main groove; and
a row of small blocks formed by partitioning with a plurality of circumferential narrow grooves and a plurality of width direction narrow grooves that intersect with the circumferential narrow grooves,
the circumferential narrow grooves being straight grooves and being disposed with a tire width direction disposal density of not less than 0.06 grooves/mm and not more than 0.2 grooves/mm,
the width direction narrow grooves including at least one bent portion,
a bend angle at the bent portion being not less than 40° and not more than 160°, and
a spacing of the width direction narrow grooves being not less than 0.8 times and not more than 1.2 times a spacing of the circumferential narrow grooves.