Pneumatic tire with specified rubber properties
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United States of America Patent
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Sep 3, 2002
Issued Date -
N/A
app pub date -
Mar 12, 2001
filing date -
Jan 29, 1998
priority date (Note) -
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Abstract
A pneumatic tire comprises a carcass layer provided between a pair of left and right bead sections, each of both end parts of the carcass layer in a tire width direction being turned up around a bead core from the inside of the tire to its outside, and a bead apex arranged in an outer peripheral side of the bead core, wherein at least a 30% area of a cross-sectional area of the bead apex positioned in a range of 20 to 35% of a tire section height SH is made of low tan .delta. rubber which is set in a range of 25 to 75% of tan .delta. of base bead apex rubber for a bead apex main body.
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