An article of footwear having an upper and a sole structure secured to the upper, the sole structure comprising: a fluid-filled chamber that encloses a pressurized fluid, the fluid-filled chamber having a first surface, a second surface, and a sidewall surface, the first surface being oriented to face toward the upper, the second surface being located opposite the first surface and oriented to face away from the upper, and the sidewall surface extending (i) between the first surface and the second surface and (ii) around at least a portion of the fluid-filled chamber; and wherein the fluid-filled chamber comprises a reinforcement member being formed from a material having a greater modulus of elasticity than a material forming the fluid-filled chamber, the reinforcement member including a chamfered surface facing outwardly towards a medial side and a lateral side and providing a smooth transition between the sidewall surface of the chamber and the reinforcement member, the sidewall surface of the fluid-filled chamber forming an exposed sidewall of the sole structure extending from the chamfered surface of the reinforcement member to the second surface of the fluid-filled chamber; wherein the chamfered surface defines an outer surface of the article of footwear and the sidewall surface of the fluid-filled chamber is exposed along an entire periphery of the reinforcement member, wherein the fluid-filled chamber has a shape that substantially extends from a forefoot region to a heel region and also from the lateral side to the medial side, thereby corresponding with a general outline of a foot; wherein the reinforcement member only extends around the heel region of the fluid-filled chamber and along the medial and lateral sides of the fluid-filled chamber up to a midfoot region, whereby the reinforcement member does not extend around the whole periphery of the fluid-filled chamber. a fluid-filled chamber that encloses a pressurized fluid, the fluid-filled chamber having a first surface, a second surface, and a sidewall surface, the first surface being oriented to face toward the upper, the second surface being located opposite the first surface and oriented to face away from the upper, and the sidewall surface extending (i) between the first surface and the second surface and (ii) around at least a portion of the fluid-filled chamber; and wherein the fluid-filled chamber comprises a reinforcement member being formed from a material having a greater modulus of elasticity than a material forming the fluid-filled chamber, the reinforcement member including a chamfered surface facing outwardly towards a medial side and a lateral side and providing a smooth transition between the sidewall surface of the chamber and the reinforcement member, the sidewall surface of the fluid-filled chamber forming an exposed sidewall of the sole structure extending from the chamfered surface of the reinforcement member to the second surface of the fluid-filled chamber; wherein the chamfered surface defines an outer surface of the article of footwear and the sidewall surface of the fluid-filled chamber is exposed along an entire periphery of the reinforcement member, wherein the fluid-filled chamber has a shape that substantially extends from a forefoot region to a heel region and also from the lateral side to the medial side, thereby corresponding with a general outline of a foot; wherein the reinforcement member only extends around the heel region of the fluid-filled chamber and along the medial and lateral sides of the fluid-filled chamber up to a midfoot region, whereby the reinforcement member does not extend around the whole periphery of the fluid-filled chamber.