| 摘要 |
PURPOSE:To reduce lopsided wear by setting the modulus at a 100% expanded time of a tread rubber on both side zone of main grooves lower in a defined range than that in a center zone in an aircraft radial tire having a pair of main grooves by a defined range of a tread. CONSTITUTION:A pair of main grooves 6 are provided in the positions of 15-40% of a ground contacting width from the end edges of a tread, interposing a tread center and along a tread circumference, partitioning a tread center zone and tread both side zones. The modulus of a tread rubber A on both side zones at a 100% expanded time at 100 deg.C is made relatively lower than the modulus of a tread rubber B in the center zone at a 100% expanded time at 100 deg.C within a range of 30-80%. By this constitution, the lopsided wear of tread can be prevented. |
