A bicycle solitary chainring of a bicycle front crank set for engagement with a drive chain, comprising: a plurality of teeth extending from a periphery of the chainring, wherein the plurality of teeth is formed about the periphery of the chainring; the plurality of teeth consists of an even number; the plurality of teeth including a first group of teeth and a second group of teeth, each tooth of the first group of teeth is wider than each tooth of the second group of teeth in the axial direction of the chain ring wherein each tooth of the plurality of teeth includes an outboard side and an inboard side opposite the outboard side and each tooth of the first group of teeth includes at least a first protrusion on the outboard side and each tooth of the second group of teeth is free of protrusions; wherein the first group of teeth and the second group of teeth are equal in number; wherein the teeth of the second group of teeth are arranged alternatingly and adjacently between teeth of the first group of teeth, such that a single tooth of the first group of teeth is arranged between two successive teeth of the second group of teeth; and wherein each tooth of the first and second group of teeth include a front flank and a rear flank; characterized in that the front flanks and rear flanks of the same tooth of the first group of teeth have differing shapes when viewed in an axial direction, wherein the rear flank of each tooth of the first group of teeth includes a hook feature configured for guiding the drive chain, wherein the shape of the rear flank of each tooth of the first group of teeth is differing by the hook feature from the shape of the front flank of the same tooth when viewed in an axial direction, and wherein the front flanks and rear flanks of the same tooth of the second group of teeth have differing shapes when viewed in an axial direction, wherein the rear flank of each tooth of the second group of teeth includes a hook feature configured for guiding the drive chain, wherein the shape of the rear flank of each tooth of the second group of teeth is differing by the hook feature from the shape of the front flank of the same tooth when viewed in an axial direction, wherein the hook feature includes a portion of the rear flank being aligned in the radial direction of the chainring, wherein the rear flank between a top land and the portion being aligned in the radial direction of the chainring exceeds away from the radial direction in direction to the front flank of the same tooth. a plurality of teeth extending from a periphery of the chainring, wherein the plurality of teeth is formed about the periphery of the chainring; the plurality of teeth consists of an even number; the plurality of teeth including a first group of teeth and a second group of teeth, each tooth of the first group of teeth is wider than each tooth of the second group of teeth in the axial direction of the chain ring wherein each tooth of the plurality of teeth includes an outboard side and an inboard side opposite the outboard side and each tooth of the first group of teeth includes at least a first protrusion on the outboard side and each tooth of the second group of teeth is free of protrusions; wherein the first group of teeth and the second group of teeth are equal in number; wherein the teeth of the second group of teeth are arranged alternatingly and adjacently between teeth of the first group of teeth, such that a single tooth of the first group of teeth is arranged between two successive teeth of the second group of teeth; and wherein each tooth of the first and second group of teeth include a front flank and a rear flank; characterized in that the front flanks and rear flanks of the same tooth of the first group of teeth have differing shapes when viewed in an axial direction, wherein the rear flank of each tooth of the first group of teeth includes a hook feature configured for guiding the drive chain, wherein the shape of the rear flank of each tooth of the first group of teeth is differing by the hook feature from the shape of the front flank of the same tooth when viewed in an axial direction, and wherein the front flanks and rear flanks of the same tooth of the second group of teeth have differing shapes when viewed in an axial direction, wherein the rear flank of each tooth of the second group of teeth includes a hook feature configured for guiding the drive chain, wherein the shape of the rear flank of each tooth of the second group of teeth is differing by the hook feature from the shape of the front flank of the same tooth when viewed in an axial direction, wherein the hook feature includes a portion of the rear flank being aligned in the radial direction of the chainring, wherein the rear flank between a top land and the portion being aligned in the radial direction of the chainring exceeds away from the radial direction in direction to the front flank of the same tooth.