Tire
A tire includes a pair of bead cores, a carcass layer extending between the bead cores, and a belt layer disposed on an outer side of the carcass layer in a radial direction. A tire outer diameter OD (mm) is in a range 200≤OD≤660. A total tire width SW (mm) is in a range 100≤SW≤400. A strength Tcs (N/50 mm) per a width of 50 mm of a carcass ply constituting the carcass layer is in a range 17≤Tcs/OD≤120 with respect to the tire outer diameter OD (mm).
1 . A tire comprising:
a pair of bead cores;
a carcass layer extending between the bead cores; and
a belt layer disposed on an outer side of the carcass layer in a radial direction, a tire outer diameter OD (mm) being in a range 200≤OD≤660;
a total tire width SW (mm) being in a range 100≤SW≤400; and
a strength Tcs (N/50 mm) per a width of 50 mm of a carcass ply constituting the carcass layer being in a range 17≤Tcs/OD≤120 with respect to the tire outer diameter OD (mm); wherein
in a cross-sectional view in a tire meridian direction, a tire maximum width position Ac, a point Al on a side profile of the tire at a same position as an end portion on an outer side in a radial direction of the bead core in a tire radial direction, a distance Hl radially inward from the tire maximum width position Ac to the point Al in the tire radial direction, and a point Al′ on the side profile at a radial position of 70% of the distance Hl radially inward from the tire maximum width position Ac are defined, and
a distance ΔBl′ (mm) from a point Bc to a point Bl′ in a tire width direction is in a range 1.80≤ΔBl/ΔAl′≤11.0 with respect to a distance ΔAl′ (mm) from the tire maximum width position Ac to the point Al′ in the tire width direction, the point Bc being a point on the body portion of the carcass layer at a same position as the tire maximum width position Ac in the tire radial direction and the point Bl′ being a point on the body portion of the carcass layer at a radial position of 70% of the distance Hu radially inward from the tire maximum width position Ac.
2 . A tire comprising:
a pair of bead cores;
a carcass layer extending between the bead cores; and
a belt layer disposed on an outer side of the carcass layer in a radial direction, a tire outer diameter OD (mm) being in a range 200≤OD≤660;
a total tire width SW (mm) being in a range 100≤SW≤400; and
a strength Tcs (N/50 mm) per a width of 50 mm of a carcass ply constituting the carcass layer being in a range 17≤Tcs/OD≤120 with respect to the tire outer diameter OD (mm); wherein
in a cross-sectional view in a tire meridian direction, a tire maximum width position Ac, a point Au on a side profile of the tire at a same position as an end portion of an innermost layer of the belt layer in a tire radial direction, a distance Hu radially outward from the tire maximum width position Ac to the point Au in the tire radial direction, and a point Au′ on the side profile of the tire at a radial position of 70% of the distance Hu radially outward from the tire maximum width position Ac are defined, and
a distance ΔBu′ (mm) from a point Bc to a point Bu′ in a tire width direction is in a range 1.10≤ΔBu′/ΔAu′≤8.00 with respect to a distance ΔAu′ (mm) from the tire maximum width position Ac to the point Au′ in the tire width direction, the point Bc being a point on the body portion of the carcass layer at a same position as the tire maximum width position Ac in the tire radial direction and the point Bu′ being a point on the body portion of the carcass layer at a radial position of 70% of the distance Hu radially outward from the tire maximum width position Ac.
3 . The tire according to claim 2 , wherein
the carcass ply of the carcass layer is configured by covering a carcass cord made of organic fiber with a coating rubber, the carcass cord has a cord diameter φcs (mm) in a range 0.6≤φcs≤0.9, and the carcass cord has a number of insertions Ecs (piece/50 mm) in a range 40≤Ecs≤70.
4 . The tire according to claim 2 , wherein
a distance Tsh in a tire ground contact edge is in a range 1.50≤Tsh/Tu≤6.90 with respect to a rubber gauge Tu (mm) from an end portion of the wide cross belt to an outer circumferential surface of the carcass layer.
5 . The tire according to claim 2 , wherein
in a cross-sectional view in a tire meridian direction, a tire maximum width position Ac, a point Al on a side profile of the tire at a same position as an end portion on an outer side in a radial direction of the bead core in a tire radial direction, a distance Hl radially inward from the tire maximum width position Ac to the point Al in the tire radial direction, and a point Al′ on the side profile at a radial position of 70% of the distance Hl radially inward from the tire maximum width position Ac are defined, and
a distance ΔBl′ (mm) from a point Bc to a point Bl′ in a tire width direction is in a range 1.80≤ΔBl′/ΔAl′≤11.0 with respect to a distance ΔAl′ (mm) from the tire maximum width position Ac to the point Al′ in the tire width direction, the point Bc being a point on the body portion of the carcass layer at a same position as the tire maximum width position Ac in the tire radial direction and the point Bl′ being a point on the body portion of the carcass layer at a radial position of 70% of the distance Hu radially inward from the tire maximum width position Ac.
6 . The tire according to claim 2 , wherein
an amount of depression DA (mm) of a tread profile at a tire ground contact edge has a relationship 0.008≤DA/TW≤0.060 with respect to a tire ground contact width TW.
7 . The tire according to claim 2 , wherein
the belt layer comprises a pair of cross belts formed by covering a belt cord made of steel with a coating rubber, and
a strength Tbt (N/50 mm) per a width of 50 mm of each of the pair of cross belts is in a range 25≤Tbt/OD≤250 with respect to the tire outer diameter OD (mm).
8 . The tire according to claim 2 , wherein
the carcass layer comprises a body portion and a turned-up portion, the body portion extends along a tire inner surface, the turned-up portion is turned up to an outer side in a tire width direction so as to wrap around the bead cores and extends in a tire radial direction, and
a radial height Hcs (mm) from a measurement point of a rim diameter RD to an end portion of the turned-up portion is in a range 0.49≤Hcs/SH≤0.80 with respect to a tire cross-sectional height SH (mm).
9 . The tire according to claim 8 , wherein
a contact height Hcs′ (mm) of the body portion and the turned-up portion of the carcass layer is in a range 0.07≤Hcs′/SH with respect to the tire cross-sectional height SH (mm).
10 . The tire according to claim 2 , wherein
a strength Tbd (N) of the one bead core is in a range 45≤Tbd/OD≤120 with respect to the tire outer diameter OD (mm).
11 . The tire according to claim 10 , wherein
the bead core is constituted by a bead wire made of steel, and
a total cross-sectional area σbd (m{circumflex over (m)}2) of the bead wire is in a range 0.025≤σbd/OD≤0.075 with respect to the tire outer diameter OD (mm).
12 . The tire according to claim 2 , wherein
the carcass ply of the carcass layer is configured by covering a carcass cord made of steel with a coating rubber, the carcass cord has a cord diameter pcs (mm) in a range 0.3≤φcs≤1.1, and
the carcass cord has a number of insertions Ecs (piece/50 mm) in a range 25≤Ecs≤80.
13 . The tire according to claim 12 , wherein
the carcass layer comprises a body portion and a turned-up portion, the body portion extends along a tire inner surface, the turned-up portion is turned up to an outer side in a tire width direction so as to wrap around the bead cores and extends in a tire radial direction, and
a radial height Hcs (mm) from a measurement point of a rim diameter RD to an end portion of the turned-up portion is in a range 0.49≤Hcs/SH≤0.80 with respect to a tire cross-sectional height SH (mm).
14 . The tire according to claim 13 , wherein
a contact height Hcs′ (mm) of the body portion and the turned-up portion of the carcass layer is in a range 0.07≤Hcs′/SH with respect to the tire cross-sectional height SH (mm).
15 . The tire according to claim 14 , wherein
a distance Tsh in a tire ground contact edge is in a range 1.50≤Tsh/Tu≤6.90 with respect to a rubber gauge Tu (mm) from an end portion of the wide cross belt to an outer circumferential surface of the carcass layer.
16 . The tire according to claim 15 , wherein
in a cross-sectional view in a tire meridian direction, a tire maximum width position Ac, a point Al on a side profile of the tire at a same position as an end portion on an outer side in a radial direction of the bead core in a tire radial direction, a distance Hl radially inward from the tire maximum width position Ac to the point Al in the tire radial direction, and a point Al′ on the side profile at a radial position of 70% of the distance Hl radially inward from the tire maximum width position Ac are defined, and
a distance ΔBl′ (mm) from a point Bc to a point Bl′ in a tire width direction is in a range 1.80≤ΔBl′/ΔAl′≤11.0 with respect to a distance ΔAl′ (mm) from the tire maximum width position Ac to the point Al′ in the tire width direction, the point Bc being a point on the body portion of the carcass layer at a same position as the tire maximum width position Ac in the tire radial direction and the point Bl′ being a point on the body portion of the carcass layer at a radial position of 70% of the distance Hu radially inward from the tire maximum width position Ac.
17 . The tire according to claim 16 , wherein
an amount of depression DA (mm) of a tread profile at a tire ground contact edge has a relationship 0.008≤DA/TW≤0.060 with respect to a tire ground contact width TW.
18 . The tire according to claim 17 , wherein
the belt layer comprises a pair of cross belts formed by covering a belt cord made of steel with a coating rubber, and
a strength Tbt (N/50 mm) per a width of 50 mm of each of the pair of cross belts is in a range 25≤Tbt/OD≤250 with respect to the tire outer diameter OD (mm).
19 . The tire according to claim 18 , wherein
a strength Tbd (N) of the one bead core is in a range 45≤Tbd/OD≤120 with respect to the tire outer diameter OD (mm), the bead core is constituted by a bead wire made of steel, and
a total cross-sectional area σbd (m{circumflex over (m)}2) of the bead wire is in a range 0.025≤σbd/OD≤0.075 with respect to the tire outer diameter OD (mm).