Patent ID: 8950452
Filing Date: 2015-02-10
Classification: B60C,Y10S

Abstract:
1. A motorcycle tire for running on rough terrain comprising a tread portion provided with a plurality of blocks defining a unidirectional tread pattern for which a tire rotational direction is specified, the blocks including a T-sided block, the T-sided block having a top surface, a heel-side sidewall surface extending radially inwardly from a heel-side edge of the top surface, and a toe-side sidewall surface extending radially inwardly from a toe-side edge of the top surface, wherein in a cross section perpendicular to the top surface and parallel to the tire circumferential direction, the angle α of inclination of the heel-side sidewall surface towards the heel-side is, at the heel-side edge, in a range of from 0 to 15 degrees with respect to the normal direction to the top surface, the toe-side sidewall surface comprises a radially outer region extending radially inwardly from the toe-side edge so as to have a height of from 20 to 55% of the height of the T-sided block, and a radially inner region extending radially inwardly from the radially outer region, said radially outer region is inclined toward the toe-side at an angle β of from 20 to 45 degrees with respect to the normal direction to the top surface at the toe-side edge, the radially inner region has a central part extending at the same angle β as the radially outer region, a pair of lateral parts located one on each side of the central part and having at an inclination angle γ toward the toe-side in a range of from 0 to 15 degrees with respect to the normal direction, and a pair of stepped parts extending between the lateral parts and the central part in a direction crosswise to the toe-side edge.