Patent ID: 6557605
Filing Date: 2003-05-06
Classification: B60C,Y10T

Abstract:
A pneumatic tire comprisinga carcass extending between bead portions through a tread portion and sidewall portions, a breaker disposed radially outside a crown portion of the carcass and made of cords laid at an angle of 15 to 40 degrees with respect to the tire equator, a pair of axially spaced high modulus edge bands disposed radially outward of edge portions of the breaker and each made of one or more high modulus cords having a sectional area SH and a 2% modulus MH and wound at a cord count DH, a low modulus middle band disposed radially outward of the breaker between the high modulus edge bands and made of one or more low modulus cords having a sectional area SL and a 2% modulus ML less than the 2% modulus MH and wound at a cord count DL, and an elongation resistance index PH of each of the high modulus edge bands, which is defined as the product of the 2% modulus MH in N/sq.mm, the sectional area SH in sq.mm and the cord count DH per 1 cm width divided by 100, being in a range of 160 to 700.