TYRE FOR HEAVYDUTY TRUCK HAVING IMPROVED DURABILITY

摘要

PURPOSE:To improve durability at the bead section by making grooves or ribs radially in the outside surface of bead section at the rim flange contacting region. CONSTITUTION:Grooves 9 having depth of 2-3mm. and interval of 1-5mm. are formed in the outer face of bead section in the region contacting with rim flange 8 and extended over a reinforcing layer 7 in the direction of side wall. With such arrangement, distorsion in the bead section can be dispersed and released resulting in improvement of radiating effect and durability.