Abstract: A highly durable pneumatic tire comprising a bias laid carcass construction formed of superimposed stacked plies is disclosed. The tire comprises a carcass body composed of at least two kinds of ply groups including cords whose diameters are different from one another. The ply groups are arranged such that the cords of outer plies are smaller in diameter than those of inner plies.

Abstract: A lug tire for agricultural machines and constructional vehicles provided with at least one discontinuous portion formed by decreasing a thickness of a base rubber at both end regions of a tread and arranged along the circumferential direction of the tire.

Abstract: A lug tire for agricultural machines comprising lugs arranged in herringbone pattern on both sides of an annular tread of a toroidal shaped carcass and spaced apart from each other by a distance which is at least 1.5 times larger than the surface width of the lug located at the outer end position of the tread, characterized in that said lug has a center region having a width corresponding to 15% to 30% of the maximum width of the tread inclusive of the lug and extending in parallel with the tire axis and a side portion region starting from the center region and inclined at an angle of at least 15.degree. with respect to the tire axis.