A sole structure for an article of footwear, the sole structure comprising: a midsole including a polymeric bladder element enclosing a fluid-filled interior cavity; a first outsole component secured to a bottom surface and to a side surface (3078, 3079) of the polymeric bladder element and including: a first base; and a wall integral with the first base; wherein the first base has integral tread elements protruding at a first portion of a bottom surface of the first base; wherein the sole structure further comprises a second outsole component including: a second base secured to the first base; and a wall integral with the second base and secured to the outer surface of the wall of the first outsole component; wherein a second portion of the bottom surface of the first base is free of any tread elements; the wall of the first outsole component has an outer surface adjacent the second portion of the bottom surface; the second base is secured to the second portion of the bottom surface of the first base; and a ground-engaging surface of the sole structure includes the integral tread elements of the first outsole component and includes the second outsole component, wherein the bladder element has an arcuate tubular portion in a forefoot region of the sole structure; and wherein the side surface of the bladder element is at an inner curved wall of the bladder element at the arcuate tubular portion. a midsole including a polymeric bladder element enclosing a fluid-filled interior cavity; a first outsole component secured to a bottom surface and to a side surface (3078, 3079) of the polymeric bladder element and including: a first base; and a wall integral with the first base; wherein the first base has integral tread elements protruding at a first portion of a bottom surface of the first base; wherein the sole structure further comprises a second outsole component including: a second base secured to the first base; and a wall integral with the second base and secured to the outer surface of the wall of the first outsole component; wherein a second portion of the bottom surface of the first base is free of any tread elements; the wall of the first outsole component has an outer surface adjacent the second portion of the bottom surface; the second base is secured to the second portion of the bottom surface of the first base; and a ground-engaging surface of the sole structure includes the integral tread elements of the first outsole component and includes the second outsole component, wherein the bladder element has an arcuate tubular portion in a forefoot region of the sole structure; and wherein the side surface of the bladder element is at an inner curved wall of the bladder element at the arcuate tubular portion. a first base; and a wall integral with the first base; wherein the first base has integral tread elements protruding at a first portion of a bottom surface of the first base; wherein the sole structure further comprises a second outsole component including: a second base secured to the first base; and a wall integral with the second base and secured to the outer surface of the wall of the first outsole component; wherein a second portion of the bottom surface of the first base is free of any tread elements; the wall of the first outsole component has an outer surface adjacent the second portion of the bottom surface; the second base is secured to the second portion of the bottom surface of the first base; and a ground-engaging surface of the sole structure includes the integral tread elements of the first outsole component and includes the second outsole component, wherein the bladder element has an arcuate tubular portion in a forefoot region of the sole structure; and wherein the side surface of the bladder element is at an inner curved wall of the bladder element at the arcuate tubular portion. a second base secured to the first base; and a wall integral with the second base and secured to the outer surface of the wall of the first outsole component; wherein a second portion of the bottom surface of the first base is free of any tread elements; the wall of the first outsole component has an outer surface adjacent the second portion of the bottom surface; the second base is secured to the second portion of the bottom surface of the first base; and a ground-engaging surface of the sole structure includes the integral tread elements of the first outsole component and includes the second outsole component, wherein the bladder element has an arcuate tubular portion in a forefoot region of the sole structure; and wherein the side surface of the bladder element is at an inner curved wall of the bladder element at the arcuate tubular portion.