A ski boot system comprising: 1.1 a ski boot with a sole having a sole forefoot portion and a sole heel portion arranged along a longitudinal axis of the ski boot, 1.2 a first connecting structure for securing the ski boot to a first ski binding of a first ski, and 1.3 a second connecting structure, separate from the first connecting structure, for securing the ski boot to a second ski binding of a second ski, 1.4 the first connecting structure, if mounted, defining below the sole forefoot portion a lateral first pivot axis for pivoting the ski boot about the first pivot axis relative to the first ski, the first pivot axis intersecting the longitudinal axis, as seen in a plan view onto the sole, and 1.5 the second connecting structure, if mounted, defining below the sole forefoot portion a lateral second pivot axis for pivoting the ski boot about the second pivot axis relative to the second ski, the second pivot axis intersecting the longitudinal axis, in the plan view, in front of the first pivot axis, 1.6 wherein the sole comprises a downwardly facing first mounting area for mounting the first connecting structure in surface contact with the first mounting area and a downwardly facing second mounting area for mounting the second connecting structure in surface contact with the second mounting area, and 1.7 wherein the second mounting area is axially further forward than the first mounting area,and 1.8 wherein only one of the first connecting structure and the second connecting structure is mounted on the sole, wherein 1.9 the first connecting structure comprises a first base with a contact surface for contacting the first mounting area of the sole and a left engaging member and a right engaging member defining the first pivot axis and forming a pivot joint with a toe piece of the first ski binding, the first pivot axis being the rotary axis of the pivot joint, the first connecting structure comprises a bearing structure that protrudes from the first base in a direction transverse to the respective pivot axis and carries the left engaging member and the right engaging member for engagement with the toe piece of the first ski binding. 1.10 the second connecting structure comprises a second base with a contact surface for contacting the second mounting area of the sole and one engaging member extending laterally between sidebars of the base and defining the second pivot axis and forming a pivot joint with a toe piece of the second ski binding, the second pivot axis being the rotary axis of the pivot joint. 1.1 a ski boot with a sole having a sole forefoot portion and a sole heel portion arranged along a longitudinal axis of the ski boot, 1.2 a first connecting structure for securing the ski boot to a first ski binding of a first ski, and 1.3 a second connecting structure, separate from the first connecting structure, for securing the ski boot to a second ski binding of a second ski, 1.4 the first connecting structure, if mounted, defining below the sole forefoot portion a lateral first pivot axis for pivoting the ski boot about the first pivot axis relative to the first ski, the first pivot axis intersecting the longitudinal axis, as seen in a plan view onto the sole, and 1.5 the second connecting structure, if mounted, defining below the sole forefoot portion a lateral second pivot axis for pivoting the ski boot about the second pivot axis relative to the second ski, the second pivot axis intersecting the longitudinal axis, in the plan view, in front of the first pivot axis, 1.6 wherein the sole comprises a downwardly facing first mounting area for mounting the first connecting structure in surface contact with the first mounting area and a downwardly facing second mounting area for mounting the second connecting structure in surface contact with the second mounting area, and 1.7 wherein the second mounting area is axially further forward than the first mounting area,and 1.8 wherein only one of the first connecting structure and the second connecting structure is mounted on the sole, wherein 1.9 the first connecting structure comprises a first base with a contact surface for contacting the first mounting area of the sole and a left engaging member and a right engaging member defining the first pivot axis and forming a pivot joint with a toe piece of the first ski binding, the first pivot axis being the rotary axis of the pivot joint, the first connecting structure comprises a bearing structure that protrudes from the first base in a direction transverse to the respective pivot axis and carries the left engaging member and the right engaging member for engagement with the toe piece of the first ski binding. 1.10 the second connecting structure comprises a second base with a contact surface for contacting the second mounting area of the sole and one engaging member extending laterally between sidebars of the base and defining the second pivot axis and forming a pivot joint with a toe piece of the second ski binding, the second pivot axis being the rotary axis of the pivot joint.