Transmission having an input shaft and an output shaft, the transmission comprising the following features: - an outer gear and an inner gear arranged concentrically to the outer gear inside the outer gear, and a traction mechanism extending between the outer gear and the inner gear, - at least one revolving transmitter which lifts the traction mechanism from the outer circumference of the inner gear and presses it against the inner circumference of the outer gear, - wherein the output shaft is connected to the inner gear, - wherein the at least one revolving transmitter is connected to the input shaft, - wherein the outer gear is connected to a transmission housing, - wherein an electric motor is provided, the rotor of which is connected to the input shaft of the transmission, wherein the traction mechanism is a toothed belt (102) having an internal toothing and an external toothing, and the external toothing engages an internal toothing of the outer gear, and - wherein the internal toothing engages the external toothing of the inner gear, and wherein tooth crests of the internal toothing comprise a rounded region with a cross section in the shape of a segment of a circle, and wherein tooth crests of the external toothing comprise a rounded region with a cross section in the shape of a segment of a circle, and wherein a region formed as a tooth base between two adjacent tooth crests of the internal toothing is at least as wide as a tooth width of teeth of the internal toothing, and wherein a region formed as a tooth base between two adjacent tooth crests of the external toothing is at least as wide as a tooth width of teeth of the external toothing, wherein the tooth crests of the internal toothing are arranged radially opposite the tooth bases of the external toothing so that the toothed belt (102) comprises an offset gap arrangement in which the teeth of the internal toothing and the external toothing are offset from one another, and wherein the toothed belt (102) comprises a smooth central bearing region on the inside and a central bearing region on the outside, wherein the revolving transmitter contacts the inner bearing surface. - an outer gear and an inner gear arranged concentrically to the outer gear inside the outer gear, and a traction mechanism extending between the outer gear and the inner gear, - at least one revolving transmitter which lifts the traction mechanism from the outer circumference of the inner gear and presses it against the inner circumference of the outer gear, - wherein the output shaft is connected to the inner gear, - wherein the at least one revolving transmitter is connected to the input shaft, - wherein the outer gear is connected to a transmission housing, - wherein an electric motor is provided, the rotor of which is connected to the input shaft of the transmission, wherein the traction mechanism is a toothed belt (102) having an internal toothing and an external toothing, and the external toothing engages an internal toothing of the outer gear, and - wherein the internal toothing engages the external toothing of the inner gear, and wherein tooth crests of the internal toothing comprise a rounded region with a cross section in the shape of a segment of a circle, and wherein tooth crests of the external toothing comprise a rounded region with a cross section in the shape of a segment of a circle, and wherein a region formed as a tooth base between two adjacent tooth crests of the internal toothing is at least as wide as a tooth width of teeth of the internal toothing, and wherein a region formed as a tooth base between two adjacent tooth crests of the external toothing is at least as wide as a tooth width of teeth of the external toothing, wherein the tooth crests of the internal toothing are arranged radially opposite the tooth bases of the external toothing so that the toothed belt (102) comprises an offset gap arrangement in which the teeth of the internal toothing and the external toothing are offset from one another, and wherein the toothed belt (102) comprises a smooth central bearing region on the inside and a central bearing region on the outside, wherein the revolving transmitter contacts the inner bearing surface.