A bicycle crankset, comprising a right crank arm and a toothed crown, the toothed crown comprising an annular body extending about a rotation axis, a plurality of teeth that extend from said annular body along respective radially outer directions and a plurality of coupling portions (160a', 160a", 160b', 160b") for coupling with said right crank arm and that extend from said annular body on the opposite side to said plurality of teeth, said annular body comprising: - an axially inner surface; - an axially outer surface; - a reference plane on which said rotation axis lies and a longitudinal axis of said right crank arm is intended to lie when said right crank arm is coupled with said annular body at said plurality of coupling portions (160a', 160a", 160b', 160b") and at said axially outer surface; the annular body having a maximum axial thickness equal to the distance between two main planes (P1, P2) parallel to each other and orthogonal to said reference plane, said maximum axial thickness being defined at at least one first angular portion (141, 142) of said annular body; wherein said at least one first angular portion (141, 142) of said annular body comprises a first lightening recess (181, 182), wherein said at least one first angular portion (141, 142) extends circumferentially between two delimiting planes (K, L) passing through said rotation axis, and characterised in that a first delimiting plane of said two delimiting planes (K, L) being inclined with respect to said reference plane by a first angle comprised between about 21° and about 27°, the extreme values being included, and a second delimiting plane of said two delimiting planes (K, L) being inclined with respect to said reference plane by a second angle comprised between about 67° and about 73°, the extreme values being included, wherein said first angle and second angle are measured on said axially outer surface moving angularly in the clockwise direction from said reference plane; said first lightening recess (181, 182) is formed on said axially outer surface. - an axially inner surface; - an axially outer surface; - a reference plane on which said rotation axis lies and a longitudinal axis of said right crank arm is intended to lie when said right crank arm is coupled with said annular body at said plurality of coupling portions (160a', 160a", 160b', 160b") and at said axially outer surface; the annular body having a maximum axial thickness equal to the distance between two main planes (P1, P2) parallel to each other and orthogonal to said reference plane, said maximum axial thickness being defined at at least one first angular portion (141, 142) of said annular body; wherein said at least one first angular portion (141, 142) of said annular body comprises a first lightening recess (181, 182), wherein said at least one first angular portion (141, 142) extends circumferentially between two delimiting planes (K, L) passing through said rotation axis, and characterised in that a first delimiting plane of said two delimiting planes (K, L) being inclined with respect to said reference plane by a first angle comprised between about 21° and about 27°, the extreme values being included, and a second delimiting plane of said two delimiting planes (K, L) being inclined with respect to said reference plane by a second angle comprised between about 67° and about 73°, the extreme values being included, wherein said first angle and second angle are measured on said axially outer surface moving angularly in the clockwise direction from said reference plane; said first lightening recess (181, 182) is formed on said axially outer surface. the annular body having a maximum axial thickness equal to the distance between two main planes (P1, P2) parallel to each other and orthogonal to said reference plane, said maximum axial thickness being defined at at least one first angular portion (141, 142) of said annular body; wherein said at least one first angular portion (141, 142) of said annular body comprises a first lightening recess (181, 182), wherein said at least one first angular portion (141, 142) extends circumferentially between two delimiting planes (K, L) passing through said rotation axis, and characterised in that a first delimiting plane of said two delimiting planes (K, L) being inclined with respect to said reference plane by a first angle comprised between about 21° and about 27°, the extreme values being included, and a second delimiting plane of said two delimiting planes (K, L) being inclined with respect to said reference plane by a second angle comprised between about 67° and about 73°, the extreme values being included, wherein said first angle and second angle are measured on said axially outer surface moving angularly in the clockwise direction from said reference plane; said first lightening recess (181, 182) is formed on said axially outer surface.