PNEUMATIC TIRE
In a pneumatic tire, a belt cover disposed on an outer side in a radial direction of a belt layer includes a cover portion having a width equal to a width of the belt cover, and edge cover portions layered on the cover portion at two locations on both sides of the cover portion. Of the edge cover portions at the two locations, one of the edge cover portions is located on a radially inner side of the cover portion, and the other of the edge cover portions is located on a radially outer side of the cover portion. The belt cover is a single strip material having a band-like shape spirally wound about a tire rotation axis, and the cover portion at least partially includes a portion where circumferential portions adjacent in the width direction of the strip material that is spirally wound overlap in the radial direction.
1 . A pneumatic tire, comprising:
a belt layer disposed in a tread portion; and
a belt cover disposed on an outer side in a tire radial direction of the belt layer,
the belt cover comprising
a full cover portion having a width in a tire width direction being equal to a width in the tire width direction of the belt cover and
edge cover portions layered on the full cover portion at two locations on both sides in the tire width direction of the full cover portion,
of the edge cover portions at the two locations, one of the edge cover portions being located on an inner side in the tire radial direction of the full cover portion, and an other of the edge cover portions being located on an outer side in the tire radial direction of the full cover portion,
the belt cover being formed by spirally winding a single strip material having a band-like shape about a tire rotation axis, and
the full cover portion at least partially comprising a portion where circumferential portions adjacent in the tire width direction of the strip material that is spirally wound overlap in the tire radial direction.
2 . The pneumatic tire according to claim 1 , wherein the full cover portion comprises a full cover center portion straddling a tire equatorial plane, and full cover shoulder portions, each of which is located on an outer side in the wire width direction of the full cover center portion, the circumferential portions adjacent in the tire width direction of the strip material being spirally wound while being overlapped in the tire radial direction in the full cover shoulder portion.
3 . The pneumatic tire according to claim 2 , wherein the belt cover has a relationship between a width Ws of the strip material and a wrapping pitch Ps that is Ps/Ws=1 in the edge cover portion, that is in a range 0.5≤Ps/Ws≤1 in the full cover center portion, and that is Ps/Ws=0.5 in the full cover shoulder portion.
4 . The pneumatic tire according to claim 2 , wherein the full cover shoulder portion has a width in the tire width direction being in a range 0.05≤Wfs/Wc≤0.3 with respect to a width Wc in the tire width direction of the belt cover.
5 . The pneumatic tire according to claim 1 , wherein the strip material comprises a plurality of cords, and the number of cords is within a range of 8 or more and 16 or less.
6 . The pneumatic tire according to claim 1 , wherein the belt cover has a width in the tire width direction being greater than a width in the tire width direction of the belt layer, and covers the belt layer from the outer side in the tire radial direction.
7 . The pneumatic tire according to claim 3 , wherein the full cover shoulder portion has a width in the tire width direction being in a range 0.05≤Wfs/Wc≤0.3 with respect to a width Wc in the tire width direction of the belt cover.
8 . The pneumatic tire according to claim 7 , wherein the strip material comprises a plurality of cords, and the number of cords is within a range of 8 or more and 16 or less.
9 . The pneumatic tire according to claim 8 , wherein the belt cover has a width in the tire width direction being greater than a width in the tire width direction of the belt layer, and covers the belt layer from the outer side in the tire radial direction.