Patent ID: 9027617
Filing Date: 2015-05-12
Classification: B60C,Y10T

Abstract:
1. A pneumatic tire of the present invention comprising: a tread portion; a pair of side wall portions; a pair of bead portions; a carcass constituted of at least one carcass ply extending in a toroidal shape between bead cores in the respective bead portions; a belt disposed on the outer peripheral side of a crown region of the carcass and formed by at least one inclined belt layer made of cords extending to be inclined with respect to the equatorial plane of the tire; and a tread rubber disposed on the radially outer side of the belt, wherein a ratio of BD/BW satisfies the following formula: (0.062×tire aspect ratio−0.01)<BD/BW<(0.062×tire aspect ratio+0.004), provided that BD is a difference in radial distance measured from the rim diameter line between the maximum-radial distance position and a widthwise end edge position of the outermost layer of the inclined belt and BW is a width of the outermost inclined belt layer in a meridian cross section of the tire in a state where the tire is assembled with an application wheel rim, wherein a ratio of SWh/SH is in the range of 0.75 to 0.80, where SH is a cross sectional height of the tire and SWh is a radial distance measured from a wheel rim line to a position where a tire width reaches the maximum value thereof, wherein a ratio of BW/SW satisfies the following formula: (−1.04×tire aspect ratio+1.33)<BW/SW<(−1.04×tire aspect ratio+1.43), where BW is the width of the outermost inclined belt layer and SW is a maximum width of the tire in the meridian cross section of the tire, and the tire aspect ratio is equal to or less than 0.55.