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motorcycle tires

A motorcycle and tire technology, applied in motorcycle tires, motorcycles, tire parts and other directions, can solve the problems of reduced cornering performance, inability to exert grip, etc., to improve cornering performance, inhibit spongy thermal damage, improve Effect of rolling resistance performance

Active Publication Date: 2016-08-17
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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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

The motorcycle tire of the present invention can achieve high levels of rolling resistance performance, high-speed durability performance, and cornering performance. The outer surface of the tread portion of the motorcycle tire (1) protrudes outward in the tire radial direction and extends curved in an arc shape. Tread rubber (2G) includes: center rubber (CR), shoulder rubber (SH) and middle rubber (MD). The central rubber (CR) includes a central top layer (CRc) and a central basal layer (CRb). The loss tangent (tanδ1b) of the center base layer (CRb) and the width (L1b) in the tire axial direction are limited to predetermined ranges.

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 prevented from being thermally damaged (porous) in a spongy state due to hea...

Claims

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Application Information

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Patent Type & Authority Patents(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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