An actuation system for deploying and retracting a lift assisting device of a wing of an aircraft, the actuation system comprising: a track pivotally coupled to the lift assisting device, the track having a first outer surface and a second outer surface opposite the first outer surface; a plurality of bearings each comprising: a single piece outer ring comprising a radially inward facing first outer roller race, and a radially inward facing second outer roller race; an inner ring assembly comprising a first inner ring and a second inner ring axially abutting one another at an abutment interface, the first inner ring having a radially outward facing first inner roller race, the second inner ring having a radially outward facing second inner roller race, the inner ring assembly being disposed in the interior area coaxially with the outer ring,; a plurality of first rollers each having a first roller diameter (D R1) and each of the plurality of first rollers rollingly engaging the first outer roller race and the first inner roller race; and a plurality of second rollers each having a second roller diameter (D R2) and each of the plurality of second rollers rollingly engaging the second outer roller race and the second inner roller race; wherein the outer ring has an outside surface that rollingly contacts one of the first outer surface and the second outer surface of the track to guide the track along an arcuate path, characterized in that the single piece outer ring further comprises and a radially inward facing outer ball race, the first outer roller race, the second outer roller race and the outer ball race defining an interior area of the outer ring, the inner ring assembly further comprises a radially outward facing inner ball race formed in at least one of the first inner ring and the second inner ring, and that the actuation system further comprises a plurality of balls each having a ball diameter (D B) and a center point each of the plurality of balls rollingly engaging the outer ball race and the inner ball race. a track pivotally coupled to the lift assisting device, the track having a first outer surface and a second outer surface opposite the first outer surface; a plurality of bearings each comprising: a single piece outer ring comprising a radially inward facing first outer roller race, and a radially inward facing second outer roller race; an inner ring assembly comprising a first inner ring and a second inner ring axially abutting one another at an abutment interface, the first inner ring having a radially outward facing first inner roller race, the second inner ring having a radially outward facing second inner roller race, the inner ring assembly being disposed in the interior area coaxially with the outer ring,; a plurality of first rollers each having a first roller diameter (D R1) and each of the plurality of first rollers rollingly engaging the first outer roller race and the first inner roller race; and a plurality of second rollers each having a second roller diameter (D R2) and each of the plurality of second rollers rollingly engaging the second outer roller race and the second inner roller race; a single piece outer ring comprising a radially inward facing first outer roller race, and a radially inward facing second outer roller race; an inner ring assembly comprising a first inner ring and a second inner ring axially abutting one another at an abutment interface, the first inner ring having a radially outward facing first inner roller race, the second inner ring having a radially outward facing second inner roller race, the inner ring assembly being disposed in the interior area coaxially with the outer ring,; a plurality of first rollers each having a first roller diameter (D R1) and each of the plurality of first rollers rollingly engaging the first outer roller race and the first inner roller race; and a plurality of second rollers each having a second roller diameter (D R2) and each of the plurality of second rollers rollingly engaging the second outer roller race and the second inner roller race; wherein the outer ring has an outside surface that rollingly contacts one of the first outer surface and the second outer surface of the track to guide the track along an arcuate path, characterized in that the single piece outer ring further comprises and a radially inward facing outer ball race, the first outer roller race, the second outer roller race and the outer ball race defining an interior area of the outer ring, the inner ring assembly further comprises a radially outward facing inner ball race formed in at least one of the first inner ring and the second inner ring, and that the actuation system further comprises a plurality of balls each having a ball diameter (D B) and a center point each of the plurality of balls rollingly engaging the outer ball race and the inner ball race.