Patent ID: 6463973
Filing Date: 2002-10-15
Classification: B60C

Abstract:
A vehicle tire comprising a tread rubber forming a ground contacting face of the tire,said tread rubber, in a range from the ground contacting face to a certain depth, comprising circumferentially extending wide parts made of a carbon-black-reinforced rubber composition and circumferentially extending narrow parts made of a silica-reinforced rubber composition, which wide parts and narrow parts alternate in the tire axial direction, the axial width of each said narrow part being in the range of from 0.5 to 1. mm, and the number of the narrow parts counted across a ground contacting width of the ground contacting face being in a range of from 3 to 11, wherein a loss tangent of the carbon-black-reinforced rubber composition is not less than 0.200 at a temperature of 70 degrees C., and a peak temperature at which the loss tangent becomes maximum is in a range of from âˆ’30 to âˆ’10. degrees C., and the silica-reinforced rubber composition comprises 100 parts by weight of diene rubber as its base rubber material, 30 to 100 parts by weight of silica, and 3 to 20 parts by weight of carbon black.