Patent ID: 8801021

Claim:
A front fork spring leg comprising: a vehicle body-side tube and an axle-side tube inserted into each other; a guide cylinder provided at a central portion of an inside of one of the vehicle body-side tube and the axle-side tube; a guide of a guide rod provided at a central portion of an inside of the other one of the vehicle body-side tube and the axle-side tube, with the guide being inserted into the guide cylinder; a piston ring and, an inward-facing seal member and at least one outward-facing seal member provided on an outer periphery of the guide of the guide rod so as to be slidably in contact with an inner periphery of the guide cylinder; and an inner air spring chamber formed in an inside of the guide cylinder by being defined by the guide of the guide rod, wherein the inward-facing seal member, the at least one outward-facing seal member, and the piston ring are arranged on the outer periphery of the guide of the guide rod sequentially in this order along an axial direction of the guide from a side close to the inner air spring chamber toward a side far from the inner air spring chamber; and the inward-facing seal member has a lip that is slidably in contact with the inner periphery of the guide cylinder, the lip of the inward-facing seal member being oriented toward the inner air spring chamber, and the at least one outward-facing seal member has a lip that is slidably in contact with the inner periphery of the guide cylinder, the lip of the at least one outward-facing seal member being oriented in an opposite direction to the inner air spring chamber.