摘要:
A pneumatic tire comprises grooves 1 to 3 formed in a tread and land portions 4 each having an acute angle portion 5 formed by the grooves 2 and 3. The acute angle portion 5 is chamfered by a plurality of chamfered surfaces 11 and 12 to form into a step shape by the chamfered surfaces 11 and 12 and a connecting surface 21 that connects the adjacent chamfered surfaces 11 and 12. Furthermore, from one sidewall to the other sidewall of the acute angle portion 5 at an end 6 of the acute angle portion 5, a height H1 of the chamfered surface 11 and a height H2 of the chamfered surface 12 are gradually decreased while a length L1 of the chamfered surface 11 and a length L2 of the chamfered surface 12 are gradually increased.
摘要:
An object of the present invention is to provide a pneumatic tire that ensures both of the on-ice braking performance and the dry braking performance. In order to achieve the object, a pneumatic tire comprises a tread surface including a land portion in which a plurality of sipes are formed, wherein each of the sipes includes a reference plane extending in a depth direction of the sipe from a wavy or zigzag line in the surface of the land portion and each of the sipes is formed with a convex portion having a convex shape in a vertical section with respect to the reference plane in a top area at the front side and the rear side thereof.
摘要:
A pneumatic tire has a tread pattern including a plurality of main grooves extending along a tire circumferential direction, and a shoulder land portion constructed by a rib or a block row formed in an outer side in a tire width direction of the main groove positioned in an outermost side. A circumferential sipe is provided in each of the shoulder land portions in both sides in the tire width direction. The number of the circumferential sipes provided in the shoulder land portion in a vehicle inner side is larger than the number of the circumferential sipes provided in the shoulder land portion in a vehicle outer side.
摘要:
It is an object of the present invention to provide a pneumatic tire capable of securing rigidity of a tip end of a block, and effectively preventing deviated wear of a tread surface. In a tread surface of a pneumatic tire formed with a block 30 having a tip end 31 which is tapered as viewed from above, and a block 20 having a sidewall surface 25 opposed to a sidewall surface 32 of the block 30, the tip end 31 of the block 30 is provided with a taper cut portion 33 whose land portion height is gradually reduced toward its tip end side, and a bridge portion 34 which is connected to the sidewall surface 25 of the block 20 at a substantially constant land portion height from the tip end of the taper cut portion 33.
摘要:
In a tire, a phase difference L1 of transverse grooves 2 is within 25% of the length L of blocks 3, the projected portions 11 are alternately on both sidewalls 10, L2 of the portion 11 is 20% to 45% of L, and in the cross-section of the width direction of the main groove 1, the edge 15 of the portion 11 at the groove bottom is more of a sidewall 10 side than a center line 19 of the groove 1, the outline of the portion 11 is at least on a virtual surface 17 that connects the edge 13 of the groove 1 at the tread surface and the edge 15. The tire also has one or a plurality of sub-projected portions 21, 22 projected from the surface 17.
摘要:
A pneumatic tire is provided, where the rigidity of the blocks formed on the tread surface is increased and an increase in the level of noise when the tread surface is worn can be prevented. In a pneumatic tire where a number of blocks which are separated by a number of grooves are formed on tread surface, these grooves comprise main grooves that extend along the direction around the tire, or across the direction around the tire, sub-grooves that extend so as to connect to these main grooves, a pair of first raised bottom portions formed in the vicinity of the two ends of each portion of sub-groove which separates blocks, and at least one second raised bottom portion that is formed between each pair of the first raised bottom portions.
摘要:
A pneumatic tire with rim protectors protruding outwardly from the outer side of a tire a distance greater than the outer surface on at least one outer surface of the sidewalls from the bead portions toward the tread and continuously formed in the tire circumferential direction. The rim protectors have the first top portion protruding outwardly from the tire outer side a distance greater than the outer surface through a first hillside portion in a cross-sectional shape from the bead portions toward the tread and a second top portion protruding in a stepped state from the first top portion through the second hillside portion. The second hillside portion extends more to the tire inner side and connects a vertex of the first top portion and an end point in a tread side of a virtual arc on the outer surface of the sidewalls.
摘要:
It is an object of the present invention to provide a pneumatic tire capable of securing rigidity of a tip end of a block, and effectively preventing deviated wear of a tread surface. In a tread surface of a pneumatic tire formed with a block 30 having a tip end 31 which is tapered as viewed from above, and a block 20 having a sidewall surface 25 opposed to a sidewall surface 32 of the block 30, the tip end 31 of the block 30 is provided with a taper cut portion 33 whose land portion height is gradually reduced toward its tip end side, and a bridge portion 34 which is connected to the sidewall surface 25 of the block 20 at a substantially constant land portion height from the tip end of the taper cut portion 33.