An article of footwear, comprising: an upper; a sole structure attached to the upper; and a tensioning system disposed within the sole structure, the tensioning system including: a reel member configured to rotate about a central axis, the reel member having a shaft extending from a first end to a second end opposite the first end; characterized in that the tensioning system further comprises a lead screw extending from the second end of the shaft and having a first set of threads, wherein the lead screw is configured to rotate about the central axis; an indicator tab mounted on the lead screw such that the indicator tab is moveable linearly along the lead screw from a first position on the lead screw to a second position on the lead screw as the lead screw rotates about the central axis; and an optical sensing unit disposed adjacent the lead screw; wherein the reel member is configured to tighten the tensioning system by winding a lace around the shaft based, at least in part, on the position of the indicator tab as detected by the optical sensing unit; wherein the optical sensing unit comprises a first optical sensor and a second optical sensor; wherein the first optical sensor is vertically aligned with the indicator tab such that the first optical sensor can detect the indicator tab when the indicator tab is in the first position; and wherein the second optical sensor is vertically aligned with the indicator tab such that the second optical sensor can detect the indicator tab when the indicator tab is in the second position. an upper; a sole structure attached to the upper; and a tensioning system disposed within the sole structure, the tensioning system including: a reel member configured to rotate about a central axis, the reel member having a shaft extending from a first end to a second end opposite the first end; characterized in that the tensioning system further comprises a lead screw extending from the second end of the shaft and having a first set of threads, wherein the lead screw is configured to rotate about the central axis; an indicator tab mounted on the lead screw such that the indicator tab is moveable linearly along the lead screw from a first position on the lead screw to a second position on the lead screw as the lead screw rotates about the central axis; and an optical sensing unit disposed adjacent the lead screw; wherein the reel member is configured to tighten the tensioning system by winding a lace around the shaft based, at least in part, on the position of the indicator tab as detected by the optical sensing unit; wherein the optical sensing unit comprises a first optical sensor and a second optical sensor; wherein the first optical sensor is vertically aligned with the indicator tab such that the first optical sensor can detect the indicator tab when the indicator tab is in the first position; and wherein the second optical sensor is vertically aligned with the indicator tab such that the second optical sensor can detect the indicator tab when the indicator tab is in the second position. a reel member configured to rotate about a central axis, the reel member having a shaft extending from a first end to a second end opposite the first end; characterized in that the tensioning system further comprises a lead screw extending from the second end of the shaft and having a first set of threads, wherein the lead screw is configured to rotate about the central axis; an indicator tab mounted on the lead screw such that the indicator tab is moveable linearly along the lead screw from a first position on the lead screw to a second position on the lead screw as the lead screw rotates about the central axis; and an optical sensing unit disposed adjacent the lead screw; wherein the reel member is configured to tighten the tensioning system by winding a lace around the shaft based, at least in part, on the position of the indicator tab as detected by the optical sensing unit; wherein the optical sensing unit comprises a first optical sensor and a second optical sensor; wherein the first optical sensor is vertically aligned with the indicator tab such that the first optical sensor can detect the indicator tab when the indicator tab is in the first position; and wherein the second optical sensor is vertically aligned with the indicator tab such that the second optical sensor can detect the indicator tab when the indicator tab is in the second position.