A pneumatic tire, which is adapted for a standard wheel rim, comprises a tread portion, a pair of sidewall portions, a pair of bead portions, a carcass extending between the bead portions, and a rim flange holder disposed on each side of the tire and protruding axially outwardly so as to overhang a flange of the standard wheel rim. The rim flange holder has a hooking part extending radially inwardly on the axially outside of the flange so as to hook the flange. The radial measurement between the radially outermost point of the flange and the radially innermost point of the hooking part is at least 2 mm, and the rim flange holder is provided with a slit extending axially inwardly from the axial outer surface of the rim flange holder.