At least a portion of a detecting portion of a front wheel rotation speed detector is supported on one front telescopic element of a shock absorbing device and is positioned in, as viewed in the direction of a wheel axis, an area defined by a front imaginary line which passes a front end of the shock absorbing device and which is parallel to a steering axis and a rear imaginary line which passes a rear end of the shock absorbing device and which is parallel to the steering axis in a perpendicular or substantially perpendicular direction to the wheel axis and the steering axis, an area located inwards of an outer shape of a wheel, and an area which is located outside an area defined between the front and rear telescopic elements.