Single sprocket for mounting on a pedal crank , which is mounted rotatably about an axis of rotation (A), of a bicycle, and for engaging in a bicycle chain with chain inner link plate pairs and chain outer link plate pairs , having: an axial outer side , an axial inner side , a hub region with an inner profile at the radially inner end of the sprocket for transmitting torque from the pedal crank to the sprocket , wherein the hub region defines an axial hub centre plane between a hub outer plane and a hub inner plane , a tooth region with a multiplicity of teeth at a radially outer end of the sprocket for the purpose of engaging in the bicycle chain , wherein the tooth region defines an axial tooth centre plane between a tooth outer plane and a tooth inner plane , and the tooth inner plane is defined by the surfaces, lying furthermost on the inside in the axial direction (A), of the multiplicity of teeth , a connecting region which extends in the radial direction between the hub region and the tooth region of the sprocket and connects said regions to one another, wherein the connecting region defines a connecting centre plane between a connecting outer plane and a connecting inner plane , and the connecting inner plane is defined by the surfaces, lying furthermost on the inside in the axial direction (A), of the connecting region , wherein the tooth centre plane runs in a manner offset inwards in the axial direction (A) with respect to the hub centre plane , wherein, in order to increase the rigidity of the sprocket , the connecting inner plane of the connecting region runs offset inwards in the axial direction (A) with respect to the tooth inner plane of the tooth region , and the connecting region is formed by a plurality of arms which extend from the hub region to the tooth region and connect said regions to one another, characterized in that the arms are designed in cross section in the shape of a profile carrier. an axial outer side , an axial inner side , a hub region with an inner profile at the radially inner end of the sprocket for transmitting torque from the pedal crank to the sprocket , wherein the hub region defines an axial hub centre plane between a hub outer plane and a hub inner plane , a tooth region with a multiplicity of teeth at a radially outer end of the sprocket for the purpose of engaging in the bicycle chain , wherein the tooth region defines an axial tooth centre plane between a tooth outer plane and a tooth inner plane , and the tooth inner plane is defined by the surfaces, lying furthermost on the inside in the axial direction (A), of the multiplicity of teeth , a connecting region which extends in the radial direction between the hub region and the tooth region of the sprocket and connects said regions to one another, wherein the connecting region defines a connecting centre plane between a connecting outer plane and a connecting inner plane , and the connecting inner plane is defined by the surfaces, lying furthermost on the inside in the axial direction (A), of the connecting region , wherein the tooth centre plane runs in a manner offset inwards in the axial direction (A) with respect to the hub centre plane , wherein, in order to increase the rigidity of the sprocket , the connecting inner plane of the connecting region runs offset inwards in the axial direction (A) with respect to the tooth inner plane of the tooth region , and the connecting region is formed by a plurality of arms which extend from the hub region to the tooth region and connect said regions to one another, characterized in that the arms are designed in cross section in the shape of a profile carrier. <EOS>