A tire including a partially exposed block (135; 200; 300; 400; 500; 605), comprising: a tread (115; 600; 700) extending in a circumferential direction around an outer surface of the tire ; and a plurality of blocks (135; 200; 300; 400; 500; 605) protruding outwardly from the tread (115; 600; 700), wherein each block (135; 200; 300; 400; 500; 605) includes a sipe (155; 210) that divides the block into a first portion and a second portion , wherein the sipe (155; 210) further defines a first interior wall of the first portion and a second interior wall of the second portion of each block (135; 200; 300; 400; 500; 605), wherein each first portion has a first pair of lateral ends defined by a first pair of lateral walls, wherein each second portion has a second pair of lateral ends defined by a second pair of lateral walls, and wherein the first interior wall of each first portion has a zig-zag pattern extending in a radial direction, characterized in that each second portion has a chamfered edge extending between the second interior wall and one of the second pair of lateral walls, the chamfered edge exposing a portion of the zig-zag pattern on the first interior wall of each corresponding first portion . a tread (115; 600; 700) extending in a circumferential direction around an outer surface of the tire ; and a plurality of blocks (135; 200; 300; 400; 500; 605) protruding outwardly from the tread (115; 600; 700), wherein each block (135; 200; 300; 400; 500; 605) includes a sipe (155; 210) that divides the block into a first portion and a second portion , wherein the sipe (155; 210) further defines a first interior wall of the first portion and a second interior wall of the second portion of each block (135; 200; 300; 400; 500; 605), wherein each first portion has a first pair of lateral ends defined by a first pair of lateral walls, wherein each second portion has a second pair of lateral ends defined by a second pair of lateral walls, and wherein the first interior wall of each first portion has a zig-zag pattern extending in a radial direction, characterized in that each second portion has a chamfered edge extending between the second interior wall and one of the second pair of lateral walls, the chamfered edge exposing a portion of the zig-zag pattern on the first interior wall of each corresponding first portion . wherein each block (135; 200; 300; 400; 500; 605) includes a sipe (155; 210) that divides the block into a first portion and a second portion , wherein the sipe (155; 210) further defines a first interior wall of the first portion and a second interior wall of the second portion of each block (135; 200; 300; 400; 500; 605), wherein each first portion has a first pair of lateral ends defined by a first pair of lateral walls, wherein each second portion has a second pair of lateral ends defined by a second pair of lateral walls, and wherein the first interior wall of each first portion has a zig-zag pattern extending in a radial direction, characterized in that each second portion has a chamfered edge extending between the second interior wall and one of the second pair of lateral walls, the chamfered edge exposing a portion of the zig-zag pattern on the first interior wall of each corresponding first portion . <EOS>