JP2014008910A5

JP2014008910A5 -

Info

Publication number: JP2014008910A5
Application number: JP2012148041A
Authority: JP
Filing date: 2012-06-29
Publication date: 2016-05-12
Anticipated expiration: 2032-06-29

Description

本発明の空気入りタイヤにおいては、前記トレッドの接地幅内が、３本の周方向溝と、該３本の周方向溝によって区画された４列の陸部と、を有し、トレッド幅方向両外側の２列の陸部をショルダー陸部、該ショルダー陸部に挟まれた２列の陸部をセンター陸部としたとき、全陸部に対する２列の前記ショルダー陸部の割合がそれぞれ２０〜３５％であり、全陸部に対する２列の前記センター陸部の割合がそれぞれ１５〜３０％であり、前記センター陸部の少なくとも一方に、両側部を結ぶサイプであって、該サイプの両端部を結ぶ直線がトレッド幅方向に対して１６〜２４°傾斜していることが好ましい。 In the pneumatic tire of the present invention, the ground contact width of the tread includes three circumferential grooves and four rows of land portions defined by the three circumferential grooves, and the tread width direction When the two outer land portions are shoulder land portions and the two land portions sandwiched between the shoulder land portions are center land portions, the ratio of the two shoulder land portions to the entire land portion is 20 respectively. was 35%, the proportion is 15% to 30% der each of the center land portion of the second column to the total land portions is, at least one of the center land portion, a sipe connecting the both side portions, of the sipe It is preferable that the straight line connecting both ends is inclined by 16 to 24 ° with respect to the tread width direction.

Claims

In a pneumatic tire having a plurality of circumferential main grooves provided in the width of the contact surface of the tread, and a land portion defined by the circumferential grooves,
The tread rubber constituting the tread has a tan δ of 0.90 or more under the conditions of 0 ° C., frequency 52 Hz, initial strain 2.0%, and dynamic strain rate 1.0%, 60 ° C., frequency 52 Hz, initial strain 2. 0%. Tan δ under the condition of a dynamic strain rate of 1.0% is 0.12 or less, and
A pneumatic tire, wherein a negative rate within a contact width of the tread is 20 to 40%.

The ground contact width of the tread includes three circumferential grooves and four rows of land portions defined by the three circumferential grooves, and two rows of land portions on both outer sides in the tread width direction. When the shoulder land portion and the two rows of land portions sandwiched between the shoulder land portions are the center land portions, the ratio of the two shoulder land portions to the entire land portions is 20 to 35%, respectively. ratio of the center land portion of the two rows Ri 15% to 30% der respectively against,
2. The pneumatic tire according to claim 1 , wherein a sipe connecting both side portions to at least one of the center land portion, and a straight line connecting both end portions of the sipe is inclined by 16 to 24 ° with respect to the tread width direction .