Front and rear pneumatic tires for motorcycles and method of improving the performance on both wet and dry ground of a motorcycle equipped with said pair

A technology for pneumatic tires and motorcycles, applied to motorcycle tires, tire treads/tread patterns, motorcycles, etc., can solve complex problems, reduce braking distance, improve kilometer efficiency, and increase drainage capacity Effect

Inactive Publication Date: 2006-07-12
PIRELLI TYRE SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This already difficult problem is further complicated by the fact that the performance on wet roads should be guaranteed during driving along straight sections and along curves

Method used

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  • Front and rear pneumatic tires for motorcycles and method of improving the performance on both wet and dry ground of a motorcycle equipped with said pair
  • Front and rear pneumatic tires for motorcycles and method of improving the performance on both wet and dry ground of a motorcycle equipped with said pair
  • Front and rear pneumatic tires for motorcycles and method of improving the performance on both wet and dry ground of a motorcycle equipped with said pair

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Embodiment Construction

[0101] In FIG. 1, the front tire of the pair of motorcycle tires according to the present invention is indicated by reference numeral 1 .

[0102] As is known, in order for the vehicle to have good directional stability and good controllability, the front tires must have a suitable cross-section which is reduced in width compared to the rear tires, which results in the need for a specific transverse curvature of the front tires.

[0103] The magnitude of this transverse curvature is determined by the distance ht and distance wt defined by a specific ratio between the above distances ht It is measured along the equatorial plane X-X of the tread wheel circumference from the line b-b passing through the opposite ends C1 of the ground tread belt axially, and the above distance wt It is along the opposite ends of the tire in the above two axial directions c1 The string is measured.

[0104] If the axially opposite ends of the ground-contacting tread band are used for example ...

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Abstract

A pair of pneumatic tires (1, 101) comprises a front tire (1) and a rear tire (1 O 1) to be mounted, respectively, on a front wheel and on a rear wheel of a motorcycle, wherein the tread band (12) of the front tire (1) comprises: a) at least one circumferential groove (13) extending at the equatorial plane (X X) of the front tire (1) within a central zone (E) extending astride the equatorial plane (X-X); b) a plurality of transversal grooves (14) having an axially inner (14a) end lying within the central zone (E) of the tread band (12) and alternately extending from said central zone (E) towards axially opposite shoulder zones (F, G) of the tread band external to the central zone (E), at least some of the transversal grooves (14) being connected to the circumferential groove (13); and wherein the tread band (12) of the rear tire (101) comprises an area defining a substantially null sea / land ratio within a central zone (E) of the tread band (12) extending astride the equatorial plane (X-X) of the rear tire (101) and having a width of from about 5% to about 30% of the axial development of the tread band (12). Such a pair of pneumatic tires (1, 101) advantageously allows to improve both the performance on dry and wet ground and the kilometric yield and traction characteristics of the tires.

Description

Background of the invention [0001] The present invention relates to a pair of pneumatic tires comprising a front tire and a rear tire respectively mounted on the front and rear wheels of a motorcycle, said front and rear tires each comprising a ground tire A tread band, the ground-engaging tread band has a plurality of grooves. [0002] prior art [0003] In the field of pneumatic tires for motorcycles, especially in the field of pneumatic tires for so-called high performance and heavy duty "sports coupe" motorcycles, one of the most difficult problems in tire manufacturing is to improve the performance and dryness on wet road surfaces. Kilometric yield, tire wear regularity and adhesion characteristics, while at the same time finding the best possible compromise between these characteristics. [0004] As is well known to those skilled in the art, this problem is particularly difficult to solve because of these contradictory characteristics, since performance on wet roads is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C11/03B60C19/00
CPCB60C19/001B60C2200/10B60C11/0302B60C11/03B60C11/12
Inventor G·施泰因巴赫
Owner PIRELLI TYRE SPA
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