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Motorcycle tire

A technology for motorcycles and tires, applied to motorcycle tires, motorcycles, tire parts, etc., to achieve the effect of improving wet road performance and improving handling performance

Active Publication Date: 2015-03-25
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the motorcycle tire of Patent Document 1, the change in ground contact feeling accompanying the increase of the camber angle is nonlinear, and there is room for further improvement in terms of both wet performance and handling performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0082] Based on the specifications in Table 1, a trial production with figure 1 The basic structure shown and has figure 2 tread pattern of motorcycle tires. As a comparative example, a trial production with Figure 4 tread pattern of motorcycle tires. These tires were fitted to the front and rear wheels of a test vehicle and tested for wet performance and handling. The general specifications and test methods of each tire are as follows.

[0083] Test vehicle: Displacement 700cc

[0084] Tire Size: Front: 120 / 70R17, Rear: 160 / 60R17

[0085] Rim Size: Front Wheel: 3.50×17, Rear Wheel: 4.50×17

[0086]

[0087] Make the test vehicle enter the test route with a water depth of 5mm and a length of 20m on the asphalt road with a radius of 40m in a manner of stepwise increase in speed, measure the lateral acceleration (horizontal G), and calculate the speed to be 50km / h~ The average lateral G of the rear wheels at 80km / h. As a result, the comparative example 1 was expresse...

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Abstract

Motorcycle tire with both, wet performance and handling performance. The tread portion 2 includes center region (Ce) and shoulder region (Sh). Main groove 10 and shoulder sub-groove 20 are provided in tread portion 2. Main groove 10 is in substantially a V-shape with a pair of inclined portions 14 each extending from tip 13. Each shoulder sub-groove 20 extends in a circumferential direction of the tire and is connected to inclined portion 14 without causing adjacent main grooves 10 to be connected.

Description

technical field [0001] The invention relates to a tire for motorcycles which takes into account both wet performance and handling performance. Background technique [0002] Conventionally, tires for motorcycles in which grooves are provided in a tread portion have been proposed. The grooves provided in the tread portion drain water between the road surface and the tread portion to the outside of the tire during wet driving, thereby improving wet performance. [0003] However, such grooves lower the rigidity of the tread portion. Therefore, there is a problem that the handling performance at the time of turning is lowered. [0004] Patent Document 1 below proposes a tire for motorcycles in which the land ratio of the tread portion is improved. In the motorcycle tire, the land ratio of each region of the tread portion divided into a plurality of regions is specified to be in the range of 70% to 90%. Accordingly, the motorcycle tire can suppress a decrease in wet performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C11/01B60C11/13
CPCB60C11/0302B60C11/0306B60C2011/0358B60C2011/0374B60C2011/0381B60C2200/10
Inventor 中川守
Owner SUMITOMO RUBBER IND LTD
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