Patent ID: 6823911
Filing Date: 2004-11-30
Classification: B60C

Abstract:
A pneumatic tire comprising:a tread portion provided with at least one circumferential groove extending along a circumferential direction of the tire; a plurality of slant grooves, each having a leading groove wall and a trailing groove wall, each opening to the circumferential groove and obliquely extending from such an opening position toward a ground contact end of a tread thereby defining blocks; and a pseudo-land portion formed in the circumferential groove so as to promote a smooth inflow of water flowing from the circumferential groove into a first slant groove of the plurality of slant grooves, wherein: said pseudo-land portion comprises a slant face on a ground contact side so that said slant face does not contact a ground surface and faces the opening of the first slant groove; the opening of the first slant groove is between the slant face and the leading wall of the first slant groove; said opening position of said first slant groove is located on a side of the circumferential groove opposite to said pseudo-land portion formed on another side of said circumferential groove; the pseudo-land portion is arranged in the circumferential groove so as to provide an end part at a larger side of the cross sectional area of the pseudo-land portion close to the portion of the first slant groove opened to the circumferential groove; a groove shape, defined by the leading and trailing walls of the first slant groove as it extends toward the circumferential groove, is extended axially inward by a second shape defined by an axially outer edge of the pseudo-land portion and the leading wall of the first slant groove; and the blocks defined by the slant grooves do not extend axially inward of the end part of the pseudo land portion.