Pneumatic radial tires for track vehicles for new urban transportation systems

摘要

The invention relates to a radial tyre for heavy loads comprising a tread strip T, two walls S, a carcass C composed of at least one layer comprising cables approximately perpendicular to the circumferential direction of the tyre and a belt B arranged radially outside the carcass on almost all the tread strip, formed from cables having an elastic modulus at 1 % extension not less than 3 x 103 kg/mm2 and comprising at least one main layer B1 whose cables are arranged in a helix with a very low helix pitch, being almost parallel to the circumferential direction of the tyre, and at least one auxiliary layer B2 arranged radially inside the main layer and comprising cables inclined at a relatively significant angle on the circumferential direction of the tyre, so that almost all the traction caused in service along the circumferential direction due to the internal pressure is supported by the main layer, which constrains the increase in diameter of the tread strip. IMAGE