Patent ID: 6615886
Filing Date: 2003-09-09
Classification: B60C,Y10S

Abstract:
A vehicle tire comprisinga tread provided with a circumferential groove (G) on each side of the tire equator to divide the tread into a central tread portion between the circumferential grooves and a lateral tread portion axially outside each said circumferential groove, said central tread portion divided into central blocks B0 by substantially straight central oblique grooves (g) extending thereacross, said lateral tread portion provided with first oblique grooves (ga) extending from the circumferential groove (G) to the tread edge, second oblique grooves (gb) extending from the circumferential groove (G) to the tread edge without joining the first oblique grooves (ga) and alternating with the first oblique grooves (ga), cross oblique grooves (gc) each extending from one of the first oblique grooves (ga1) to the next first oblique groove (ga2) while crossing the second oblique groove (gb) therebetween, inclinations of the central oblique grooves (g) and the cross oblique grooves (gc) being reverse to inclinations of the first oblique grooves (ga) and the second oblique grooves (gb) with respect to the tire equator, whereby the lateral tread portion is divided intofirst lateral blocks B1 each defined as being surrounded by the circumferential groove (G), cross oblique groove (gc), second oblique groove (gb) and first oblique groove (ga1), second lateral blocks B2 each defined as being surrounded by the circumferential groove (G), cross oblique groove (gc), second oblique groove (gb) and first oblique groove (ga2), third lateral blocks B3 each defined as being surrounded by the cross oblique groove (gc), tread edge, second oblique groove (gb) and first oblique groove (ga1), and fourth lateral blocks B4 each defined as being surrounded by the cross oblique groove (gc), tread edge, second oblique groove (gb) and first oblique groove (ga2), the number of the first lateral blocks B1, the number of the second lateral blocks B2, the number of the third lateral blocks B3 and the number of the fourth lateral blocks B4 in each said lateral tread portion and the number of the central blocks B0 being equal to each other, and two of the cross oblique grooves (gc) meeting with one of said first oblique grooves (ga) at axially different positions.