A balloon for a balloon catheter comprising: a proximal cone section having proximal and distal ends, a length extending between the proximal and distal ends, and an exterior surface having a generally conical shape and a circumference tapering proximally toward the proximal end of the proximal cone section; a distal cone section having proximal and distal ends, a length extending between the proximal and distal ends, and an exterior surface having a generally conical shape and a circumference tapering distally toward the distal end of the distal cone section; and a balloon body section extending between and interconnecting the distal end of the proximal cone section and the proximal end of the distal cone section, the proximal and distal cone sections (28b, 28a) and the balloon body section defining an interior chamber configured to receive fluid to expand the balloon from a non-expanded state to an expanded state, wherein at least one of the proximal and distal cone sections (28b, 28a) defines a plurality of grooves spaced apart around the circumference of the corresponding cone section (28b, 28a), each groove defined by a bottom portion and opposing side wall portions extending from respective sides of the bottom portion to the exterior surface of the corresponding cone section (28b, 28a), wherein the bottom portion has a central longitudinal section and opposite distal and proximal end sections (60a, 60b) extending from corresponding distal and proximal ends of the central longitudinal portion to the exterior surface of the corresponding cone section (28b, 28a), wherein the corresponding cone section (28b, 28a) includes a plurality of ribs extending inward from the interior surface of the corresponding cone section (28b, 28a), the ribs disposed at locations on the interior surface of the corresponding cone section (28b, 28a) corresponding to locations of the grooves on the exterior surface of the corresponding cone section (28b, 28a), characterized in that at least one of the distal and proximal end sections (60a,60b) of the bottom portion of each groove is generally flat and extends at an angle offset with respect to a circumferential plane defined by the circumference of the corresponding cone section (28b,28a). a proximal cone section having proximal and distal ends, a length extending between the proximal and distal ends, and an exterior surface having a generally conical shape and a circumference tapering proximally toward the proximal end of the proximal cone section; a distal cone section having proximal and distal ends, a length extending between the proximal and distal ends, and an exterior surface having a generally conical shape and a circumference tapering distally toward the distal end of the distal cone section; and a balloon body section extending between and interconnecting the distal end of the proximal cone section and the proximal end of the distal cone section, the proximal and distal cone sections (28b, 28a) and the balloon body section defining an interior chamber configured to receive fluid to expand the balloon from a non-expanded state to an expanded state, wherein at least one of the proximal and distal cone sections (28b, 28a) defines a plurality of grooves spaced apart around the circumference of the corresponding cone section (28b, 28a), each groove defined by a bottom portion and opposing side wall portions extending from respective sides of the bottom portion to the exterior surface of the corresponding cone section (28b, 28a), wherein the bottom portion has a central longitudinal section and opposite distal and proximal end sections (60a, 60b) extending from corresponding distal and proximal ends of the central longitudinal portion to the exterior surface of the corresponding cone section (28b, 28a), wherein the corresponding cone section (28b, 28a) includes a plurality of ribs extending inward from the interior surface of the corresponding cone section (28b, 28a), the ribs disposed at locations on the interior surface of the corresponding cone section (28b, 28a) corresponding to locations of the grooves on the exterior surface of the corresponding cone section (28b, 28a), characterized in that at least one of the distal and proximal end sections (60a,60b) of the bottom portion of each groove is generally flat and extends at an angle offset with respect to a circumferential plane defined by the circumference of the corresponding cone section (28b,28a).