Pneumatic tire
In a pneumatic tire, a sipe includes an edge on a leading side and an edge on a trailing side; the edge and the edge each include a chamfered portion shorter than a sipe length of the sipe; a non-chamfered region in which other chamfered portions are not present is provided at portions facing the chamfered portions of the sipe; and for all chamfered portions, including at least the chamfered portions of the sipe, formed on grooves other than main grooves, with a ground contact width being equally divided into three in the tire lateral direction, a total volume S CE of chamfered portions provided in a center region centrally located in the tire lateral direction and each of total volumes S SH of chamfered portions provided in shoulder regions located on either side of the center region satisfy a relationship S CE <S SH .
1. A pneumatic tire, comprising:
in a tread portion, main grooves extending in a tire circumferential direction; and
a sipe extending in a tire lateral direction disposed in ribs defined by the main grooves; wherein
the sipe comprises an edge on a leading side and an edge on a trailing side;
the edge on the leading side and the edge on the trailing side each comprise a chamfered portion shorter than a sipe length of the sipe;
a non-chamfered region in which other chamfered portions are not present is provided at portions facing the chamfered portions of the sipe;
for all chamfered portions, comprising at least the chamfered portions of the sipe, formed on grooves other than the main grooves, with a ground contact width being equally divided into three in the tire lateral direction, a total volume S CE of chamfered portions provided in a center region centrally located in the tread portion in the tire lateral direction and each of total volumes S SH of chamfered portions provided in shoulder regions located on either side of the center region satisfy a relationship S CE <S SH ; and
for all chamfered portions, a total projected area A CE of the chamfered portions provided in the center region and each of total projected areas A SH of the chamfered portions provided in the shoulder regions satisfy a relationship A CE ≥A SH .
2. The pneumatic tire according to claim 1 , wherein for all chamfered portions, the total projected area A CE of the chamfered portions provided in the center region and each of the total projected areas A SH of the chamfered portions provided in the shoulder regions satisfy a relationship 1%≤(A CE -A SH )/A CE ×100%≤10%.
3. A pneumatic tire, comprising:
in a tread portion, main grooves extending in a tire circumferential direction; and
a sipe extending in a tire lateral direction disposed in ribs defined by the main grooves; wherein
the sipe comprises an edge on a leading side and an edge on a trailing side;
the edge on the leading side and the edge on the trailing side each comprise a chamfered portion shorter than a sipe length of the sipe, only one of the chamfered portions being present on each of the leading side and the trailing side;
a non-chamfered region in which other chamfered portions are not present is provided at portions facing the chamfered portions of the sipe;
for all chamfered portions, comprising at least the chamfered portions of the sipe, formed on grooves other than the main grooves, with a ground contact width being equally divided into three in the tire lateral direction, a total volume S CE of chamfered portions provided in a center region centrally located in the tread portion in the tire lateral direction and each of total volumes S SH of chamfered portions provided in shoulder regions located on either side of the center region satisfy a relationship S CE <S SH ; and
for all chamfered portions, a total projected area A CE of the chamfered portions provided in the center region and each of total projected areas A SH of the chamfered portions provided in the shoulder regions satisfy a relationship A CE ≥ASH.
4. The pneumatic tire according to claim 3 , wherein
a maximum depth x (mm) of the sipe and a maximum depth y (mm) of the chamfered portions satisfy a relationship x×0.1≤y≤x×0.3+1.0; and
a sipe width of the sipe is constant in a range from an end portion located on an inner side in a tire radial direction of each chamfered portion to a groove bottom of the sipe.
5. The pneumatic tire according to claim 3 , wherein for all chamfered portions, the total volume S CE of the chamfered portions provided in the center region and each of the total volumes S SH of the chamfered portions provided in the shoulder regions satisfy a relationship 10%≤(S SH -S CE )/S CE ×100%≤200%.
6. The pneumatic tire according to claim 3 , wherein the sipe is disposed in two or more ribs of the ribs defined by the main grooves.
7. The pneumatic tire according to claim 6 , wherein all chamfered portions are configured by the chamfered portions of the sipe.
8. The pneumatic tire according to claim 4 , wherein for all chamfered portions, the total volume S CE of the chamfered portions provided in the center region and each of the total volumes S SH of the chamfered portions provided in the shoulder regions satisfy a relationship 10%≤(S SH -S CE )/S CE ×100%≤200%.
9. The pneumatic tire according to claim 8 , wherein the sipe is disposed in two or more ribs of the ribs defined by the main grooves.
10. The pneumatic tire according to claim 9 , wherein all chamfered portions are configured by the chamfered portions of the sipe.
11. The pneumatic tire according to claim 10 , wherein for all chamfered portions, the total projected area A CE of the chamfered portions provided in the center region and each of the total projected areas A SH of the chamfered portions provided in the shoulder regions satisfy a relationship 1%<(A CE - A SH )/A CE ×100%≤10%.