CPC B60C 11/11 (2013.01) [B60C 11/0302 (2013.01); B60C 11/1369 (2013.01); B60C 2011/1338 (2013.01); B60C 2200/10 (2013.01); B60C 2200/14 (2013.01)] | 18 Claims |
1. A motorcycle tire for running on rough terrain comprising a tread portion, wherein
the tread portion includes a base surface and a plurality of blocks protruding outward in a tire radial direction from the base surface,
the blocks include a crown block arranged on a tire equator side and a shoulder block arranged on a tread edge side,
a height (hs) of the shoulder block from the base surface is larger than a height (hc) of the crown block from the base surface,
the shoulder block is provided on the base surface side with a base portion that has a locally increased cross-section taken along the base surface,
the base portion has a stepwise contour in a lateral cross section taken perpendicular to the base surface,
the stepwise contour at least includes a first surface, a second surface, and a third surface,
the first surface extends radially inward from an edge of a ground contacting surface of the shoulder block,
the second surface is connected with a radially inner end of the first surface and extends therefrom along the base surface,
the third surface is connected with a farther end of the second surface from the first surface and extends radially inward therefrom,
the blocks include a middle block arranged between the crown block and the shoulder block,
the tread portion includes a shoulder tie bar formed by a raised base surface and connecting the shoulder block with the middle block, and
a height of the shoulder tie bar is smaller than a height of the base portion.
|