Title:
乗用車用空気入りラジアルタイヤ
Document Type and Number:
Japanese Patent JP6605460
Kind Code:
B2
Abstract:
Provided is a narrow-width, large-diameter radial tire which is a passenger-vehicle pneumatic radial tire with improved wet performance and rolling resistance performance. The pneumatic radial tire for passenger vehicles of the disclosure is a passenger-vehicle pneumatic radial tire comprising: a carcass consisting of one or more carcass plies of radially arranged cords toroidally extending between a pair of bead portions; and a tread rubber disposed on a tire radial outer side of the carcass, wherein when the tire is assembled to a rim and filled with an internal pressure of 250 kPa or more, an SW/OD ratio of a sectional width SW to an outer diameter OD(mm) of the tire is 0.26 or less if the tire has a sectional width SW of less than 165(mm), whereas a sectional width SW and an outer diameter OD(mm) of the tire satisfy a relation of 2.135×SW+282.3‰¤OD if the tire has a sectional width SW of 165(mm) or more, the tread rubber has a dynamic storage modulus E' at 30°C of 6.0MPa to 12.0MPa and a loss tangent tan´ at 60°C of 0.05 to 0.15, and when a tread surface is equally divided into four regions in a tire width direction, and two regions on a tire widthwise inner side are each referred to as a center portion and two regions on a tire widthwise outer side are each referred to as a shoulder portion, a shoulder circumferential sipe extending in a tire circumferential direction is disposed in the shoulder portion.
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Inventors:
Shintaro Hatanaka
Isao Kuwayama
Isao Kuwayama
Application Number:
JP2016523164A
Publication Date:
November 13, 2019
Filing Date:
May 28, 2015
Export Citation:
Assignee:
Bridgestone Corporation
International Classes:
B60C11/12; B60C3/04; B60C11/00
Domestic Patent References:
| JP9227720A | ||||
| JP2008143485A | ||||
| JP2009202772A | ||||
| JP2006224770A | ||||
| JP2011073471A |
Foreign References:
| WO2013065319A1 | ||||
| WO2009054310A1 |
Attorney, Agent or Firm:
Kenji Sugimura
Yamaguchi Yusuke
Rei Ito
Yamaguchi Yusuke
Rei Ito