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Two-wheeled automotive vehicle tire

A technology for motorcycles and tires, applied to motorcycle tires, motorcycles, tire parts, etc., can solve the problems of reduced turning performance and inability to exert grip, so as to improve turning performance, suppress spongy thermal damage, and improve Effect of Rolling Resistance Properties

Active Publication Date: 2013-07-03
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned motorcycle tire a, since the base layer d having a small hysteresis loss is arranged over the tread end t in the tire axial direction, the tread rubber bg on the side of the tread end t mainly touches the ground during a bend. When it is used, sufficient grip cannot be exerted, and there is a problem that the turning performance is reduced.

Method used

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  • Two-wheeled automotive vehicle tire
  • Two-wheeled automotive vehicle tire
  • Two-wheeled automotive vehicle tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0168] manufactured with Figure 4 The basic structure of the motorcycle tires and the intermediate rubber of the specifications in Table 4 were tested, and their performance was tested. Furthermore, as a comparison, the Figure 5 The existing tires shown were subjected to the same test.

[0169] The common specifications are the same as those of Example I except for the following items. In addition, the test method is also the same as that of Example I.

[0170] Length L2o of outer middle rubber MDo: 50mm

[0171] L2o / L4 ratio: 43.5%

[0172] Length L6 in the tire axial direction of the ground contact surface at the time of running straight: 42mm

[0173] Mates of the central basal layer: Mate 1

[0174] FITS OF THE CENTRAL TOP LAYER: FIT 2

[0175] Fit of shoulder rubber: Fit 4

[0176] The results of the tests are shown in Table 4.

[0177] Table 4

[0178]

[0179] As a result of the test, it was confirmed that the tires of the Examples can achieve a high level...

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Abstract

Rolling resistance performance, high-speed-durability performance, and cornering performance are simultaneously realized at high levels. A two-wheeled automotive vehicle tire (1) includes a tread portion (2) having an outer surface (2S) that extends so as to be curved such that the outer surface (2S) is convex outward in the tire radial direction, and is arc-shaped. A tread rubber (2G) includes a center rubber (CR), shoulder rubbers (SH), and middle rubbers (MD). The center rubber (CR) includes a center cap layer (CRc) and a center base layer (CRb). A loss tangent (tan'1b) of the center base layer (CRb) and a width (L1b) thereof in the tire axial direction are each limited so as to be set within a predetermined range.

Description

technical field [0001] The present invention relates to a motorcycle tire capable of achieving a high level of rolling resistance performance, high-speed durability performance, and cornering performance. Background technique [0002] In recent years, with the high performance of motorcycles, high-speed durability performance is required for motorcycle tires. In order to improve the high-speed durability, for example, a motorcycle tire a is known, such as Figure 5 As shown, the tread rubber bg of the tire a is composed of a top layer c that forms the outer surface bs of the tread portion b, and a base layer d arranged on the inner side in the tire radial direction of the top layer, and the base layer d has a loss tangent tanδ ratio. Small rubber formations. [0003] Since the base layer d of such a motorcycle tire a is made of rubber with low heat generation, the tread rubber bg can be effectively suppressed from spongy thermal damage (porosity) due to heat generation duri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/00
CPCB60C2200/10B60C11/0058B60C2011/0025B60C11/005Y02T10/86B60C11/0075B60C11/00
Inventor 大谷匡史田原尚洋舩原喜代志
Owner SUMITOMO RUBBER IND LTD
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