| 摘要 |
PROBLEM TO BE SOLVED: To improve the durability of a tire by securing a uniform distortion in the radial direction in various parts of the tire and eliminating portions low in rigidity. SOLUTION: The T-type emergency bias tire satisfies expressions (1)(2): 0.75≤ä(Δht/ht<SP>2</SP>)/(Δhc/hc<SP>2</SP>)}≤1.25 (1), 0.75≤ä(Δhw/hw<SP>2</SP>)/(Δhc/hc<SP>2</SP>)}≤1.25 (2), whereinΔht is a bulging amount in the radial direction of the tire at the end part position P2 on tread surface when inner pressure changes from 50 kPa to 420 kPa, ht is the height from the bead base line BL of the position P2 in the internal pressure of 420 kPa filling state,Δhc is the bulging amount in the radial direction of the tire at the tire equator position P1 when the inner pressure changes from 50 kPa to 420 kPa, hc is the height from the bead base line BL of the position P1 in the internal pressure of 420 kPa filling state,Δhw is a bulging amount in the radial direction of the tire at the maximum width position P3 of the tire when the inner pressure changes from 50 kPa to 420 kPa, and hw is the height from the bead base line BL of the position P3 in the internal pressure of 420 kPa filling state. COPYRIGHT: (C)2006,JPO&NCIPI
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