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Title:
PNEUMATIC TIRE FOR MOTORCYCLES
Document Type and Number:
WIPO Patent Application WO/2018/123685
Kind Code:
A1
Abstract:
Provided is a pneumatic tire for motorcycles such that both grip performance when a large camber angle is applied and durability are achieved. This pneumatic tire has an aspect ratio of 80%-40% and comprises a spiral belt (7) formed by spirally winding along the tire circumferential direction a ribbon-like strip (9) obtained by coating two parallel steel cords (8) with rubber. With the pneumatic tire mounted to a suitable rim, inflated to a prescribed internal pressure, and in an unloaded state, an interval A between two steel cords of the ribbon-like strip along the periphery of the spiral belt (7) is in the range of 0.8-1.5 mm, and an interval B between adjacent steel cords of the ribbon-like strip along the periphery of the spiral belt 7 is composed of a closely spaced area M of 0.8-2.5 mm and a loosely spaced area S of 3.5-6.0 mm. The closely spaced area M has, along the periphery of the spiral belts 7 with the tire equatorial plane CL as the center, a closely spaced area M1 the length of which is 50% or less thereof and 10 mm or more. The tensile strength of each of the steel cords is in the range of 200 N-1000 N.

Inventors:
OSHIMA Masatomo (1-1 Kyobashi 3-chome, Chuo-k, Tokyo 40, 〒1048340, JP)
Application Number:
JP2017/045297
Publication Date:
July 05, 2018
Filing Date:
December 18, 2017
Export Citation:
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Assignee:
BRIDGESTONE CORPORATION (1-1 Kyobashi 3-chome, Chuo-ku Tokyo, 40, 〒1048340, JP)
International Classes:
B60C9/18; B60C3/04; B60C9/08; B60C9/20; B60C9/22
Foreign References:
JP2016141209A2016-08-08
JP2012131367A2012-07-12
JP2013159250A2013-08-19
JP2012131184A2012-07-12
JP2009120001A2009-06-04
JP2016525485A2016-08-25
JP2003260906A2003-09-16
JP2014201145A2014-10-27
JP2015174564A2015-10-05
Attorney, Agent or Firm:
HONDA Ichiro (HONDA INTERNATIONAL PATENT & TRADEMARK OFFICE, 6th Floor Yusei Fukushi Kotohira Bldg., 14-1, Toranomon 1-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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