TWO-WHEELED VEHICLE TIRE
FIG2 is an enlarged cross-sectional view of a bead portion 
FIG2 illustrates an enlarged cross-sectional view of one of the bead portions 4. As illustrated in FIG2, a radial height h2 of the second rubber portion 8B from the bead core 5 to the second end 8b is equal to or less than 25% of a radial height h1 of the first rubber portion 8A from the bead core 5 to the first end 8a. When the height h2 is more than 25% of the height h1, the effect that improves impact absorbing performance may be restricted since the rigidity of sidewall portions 3 may increase locally. In view of the above, the height h2 is preferably lower than a rim flange height of the rim (not illustrated) onto which the tire is mounted.
cross-sectional view
8
bead apex rubber
5
bead core bead cores
4
bead portions bead portion
10
middle blocks
3
sidewall portions sidewall portion
['1. A two-wheeled vehicle tire (1) comprising: a carcass (6) extending between bead cores (5) each disposed in a respective one of bead portions (4) through a tread portion (2) and sidewall portions (3), the carcass (6) comprising at least one carcass ply (6A) having a ply main portion (6a) extending between the bead cores (5) through the tread portion (2); and a bead apex rubber (8) extending radially outwardly from each bead core (5), wherein the bead apex rubber (8) comprises a first rubber portion (8A) arranged adjacent to the ply main portion (6a), and a second rubber portion (8B) arranged axially outwardly of the first rubber portion (8A), the first rubber portion (8A) has a first end (8a) positioning radially outermost thereof, the second rubber portion (8B) has a second end (8b) positioning radially outermost thereof, and the first end (8a) is located radially outwardly of the second end (8b), and  characterized in that a substantially constant-thickness region (R1) of the first rubber portion (8A) in which a difference between a maximum thickness (t1) and a minimum thickness (t2) is equal to or less than 20% of the minimum thickness (t2) has a length equal to or more than 80% of a radial height (h1) of the first rubber portion (8A) from the bead core (5) to the first end (8a).']