Motorcycle tire

A technology for motorcycles and tires, applied to motorcycle tires, motorcycles, tire parts, etc., can solve problems such as insufficient reduction of rolling resistance, improve wet grip performance, suppress deterioration of transient characteristics, and suppress The effect of energy loss

Inactive Publication Date: 2009-12-23
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned pattern, since the inclined lateral groove b is included in the straight running ground area Yc, the rubber movement in the circumferential direction increases during straight running, and the rolling resistance cannot be sufficiently reduced.

Method used

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  • Motorcycle tire
  • Motorcycle tire
  • Motorcycle tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0052] Prototypes based on the specifications in Table 1 have figure 1 Motorcycle tires (70 / 90-17) with the tire structure indicated, and the dry grip performance, wet grip performance, high-speed straight line stability, high-speed bending stability and rolling resistance of each trial tire were tested and compared with each other .

[0053] Dry Grip Performance:

[0054] Under the conditions of rim (17×1.40) and internal pressure (225KPa), the trial tire was assembled on the front wheel of a motorcycle (displacement 110cc), and the actual vehicle was driven on a dry paved road. The grip performance was judged by the driver's sensory evaluation using an index with Comparative Example 1 as 100. The larger the numerical value, the better it is.

[0055] Wet Grip Performance:

[0056] The aforementioned vehicle was actually driven on a watered paved road, and the road grip performance when driving straight was judged by the driver's sensory evaluation using an index with Co...

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PUM

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Abstract

A motorcycle tire comprises a tread portion having a tread face curved along a radially outwardly convex arc in the cross section of the tire including the rotational axis of the tire. The tread face is provided in the ground contacting region during straight running with three parallel circumferential grooves which are: a wide circumferential groove having a width Wg1 of from 8 to 16 mm and extending along the tire equator; and a pair of narrow circumferential grooves disposed one on each side of the tire equator and having a width Wg2 less than the width Wg1. Each of the narrow circumferential grooves is positioned such that the distance L1 measured along the tread face from the tire equator to the axially outside edge of the narrow circumferential groove is not more than 35 % of the width (tw) of the ground contacting region during straight running measured along the tread face.

Description

technical field [0001] The present invention relates to a tire with reduced rolling resistance without degrading the transient characteristics from straight running to turning, and in particular to a motorcycle in which three circumferential grooves are arranged in the straight ground contact region where the tread touches the ground during straight running Car tires. Background technique [0002] For example Figure 8 As illustrated, tires for motorcycles are widely used in which a central groove a extending in the circumferential direction on the tire equator C is provided on the tread surface, and tires extending from the vicinity of the central groove a toward both outer sides in the tire axial direction are widely used. A tire having inclined lateral grooves b extending in a figure-eight shape (for example, refer to Patent Document 1). In the above pattern, the central groove a and the inclined lateral groove b exert high water drainage and improve wet grip performance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/04B60C11/13
CPCB60C11/0302B60C2011/0025B60C11/0311B60C11/0058B60C2200/10Y10S152/901B60C11/0332Y02T10/86
Inventor 松永聪志
Owner SUMITOMO RUBBER IND LTD
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