The invention provides an inflatable radial tire for a maneuvering two-wheel vehicle, comprising a tire facial part, a pair of tire side parts, a tire bead part, a tire body layer formed by at least one layer of cord fabric layer and at least one layer of spiral belt layer; the spiral belt layer is winded on the tire radial outer side of the tire body layer and is composed of rubber- all-steel cord compounds formed by all-steel cord formed by a plurality of all-steel threadlike bodies embedded in the rubber; the circumcircle of the all-steel cord is adhered with strain-load characteristics in rubber state; the steel wire part sectional area of the all-steel cord is S (mm2), and the elongation of the additional load W from 1500* S(N) to 1600 *S(N) is below 0.070%; the additional load W1 (N) with the elongation being 0.35% and the additional load W2 (N) with the elongation being 0.45% meets the following relationship: W2-W1<35 * S.