An article of footwear, comprising: a set of removable cleats (136, 138, 140, 142, 144, 146); a plurality of cleat receptacles (148, 150, 152,154, 156, 158) for receiving removable cleats (136, 138, 140, 142, 144, 146) from the set of removable cleats (136, 138, 140, 142, 144, 146); and a chassis including two members (200, 201), wherein the two members (200, 201) are connected by two cross-members (206, 208), wherein the chassis includes a mounting portion to permit attachment to the article of footwear, the mounting portion including a plurality of through-holes (124, 126, 128, 130, 132, 134), wherein the number of through-holes (124, 126, 128, 130, 132, 134) correspond to the number of cleat receptacles (148, 150, 152, 154, 156, 158), wherein each through-hole (124, 126, 128, 130, 132, 134) and each cleat receptacle (148, 150, 152, 154, 156, 158) are configured to receive one removable cleat (136, 138, 140, 142, 144, 146) from the set of removable cleats (136, 138, 140, 142, 144, 146), wherein at least one portion (214, 248) of the underside of the article of footwear in a forefoot region is exposed when attached to the chassis, wherein the chassis includes the forefoot region, a midfoot region, and a heel region; wherein the two members (200, 201) include a medial member disposed along a medial side of the chassis and a lateral member disposed along a lateral side of the chassis, wherein the medial member and the lateral member each extend from the heel region to the forefoot region, and the medial member and the lateral member are connected by the two cross-members (206, 208), wherein the medial member includes a medial forward portion and a medial rearward portion forming a continuous piece, wherein the medial forward portion is disposed along the forefoot region and the medial rearward portion is disposed along the midfoot region and heel region, wherein the lateral member includes a lateral forward portion and a lateral rearward portion forming a continuous piece, wherein the lateral forward portion is disposed along the forefoot region and the lateral rearward portion is disposed along the midfoot region and heel region, wherein the two cross-members (206, 208) include a first cross-member disposed toward a forward end of the chassis and a second cross-member disposed toward a rearward end of the chassis, and wherein the first cross-member and the second cross-member each extend from the medial side of the chassis to the lateral side of the chassis. a set of removable cleats (136, 138, 140, 142, 144, 146); a plurality of cleat receptacles (148, 150, 152,154, 156, 158) for receiving removable cleats (136, 138, 140, 142, 144, 146) from the set of removable cleats (136, 138, 140, 142, 144, 146); and a chassis including two members (200, 201), wherein the two members (200, 201) are connected by two cross-members (206, 208), wherein the chassis includes a mounting portion to permit attachment to the article of footwear, the mounting portion including a plurality of through-holes (124, 126, 128, 130, 132, 134), wherein the number of through-holes (124, 126, 128, 130, 132, 134) correspond to the number of cleat receptacles (148, 150, 152, 154, 156, 158), wherein each through-hole (124, 126, 128, 130, 132, 134) and each cleat receptacle (148, 150, 152, 154, 156, 158) are configured to receive one removable cleat (136, 138, 140, 142, 144, 146) from the set of removable cleats (136, 138, 140, 142, 144, 146), wherein at least one portion (214, 248) of the underside of the article of footwear in a forefoot region is exposed when attached to the chassis, wherein the chassis includes the forefoot region, a midfoot region, and a heel region; wherein the two members (200, 201) include a medial member disposed along a medial side of the chassis and a lateral member disposed along a lateral side of the chassis, wherein the medial member and the lateral member each extend from the heel region to the forefoot region, and the medial member and the lateral member are connected by the two cross-members (206, 208), wherein the medial member includes a medial forward portion and a medial rearward portion forming a continuous piece, wherein the medial forward portion is disposed along the forefoot region and the medial rearward portion is disposed along the midfoot region and heel region, wherein the lateral member includes a lateral forward portion and a lateral rearward portion forming a continuous piece, wherein the lateral forward portion is disposed along the forefoot region and the lateral rearward portion is disposed along the midfoot region and heel region, wherein the two cross-members (206, 208) include a first cross-member disposed toward a forward end of the chassis and a second cross-member disposed toward a rearward end of the chassis, and wherein the first cross-member and the second cross-member each extend from the medial side of the chassis to the lateral side of the chassis.