Human-powered vehicle component

A human-powered vehicle component comprising:

• a crankshaft including a rotational center axis and a first coupling portion configured to be coupled to a crank arm;
• and
• a transmission provided on the crankshaft and including a second coupling portion configured to be coupled to a sprocket, the transmission being a hollow member that receives the crankshaft therethrough, the transmission being a one-piece member,
• the first coupling portion including a first positioning portion that determines a first predetermined relative phase position of the crank arm with respect to the crankshaft in a circumferential direction about the rotational center axis, and
• the second coupling portion including a second positioning portion that determines a second predetermined relative phase position of the sprocket with respect to the transmission in the circumferential direction about the rotational center axis, the second coupling portion being provided at a first end of the transmission along an axial direction of the crankshaft, the first coupling portion being positioned adjacent to the second coupling portion when the crankshaft is received by the transmission,
• the crankshaft further including a third coupling portion configured to be coupled to the transmission,
• the third coupling portion including a third positioning portion that determines a third predetermined relative phase position of the transmission with respect to the crankshaft in the circumferential direction about the rotational center axis,
• the first positioning portion including a plurality of first projections and at least one first positioning recess and/or at least one first positioning projection configured and arranged to engage with at least one projection and/or at least one recess, respectively, of the crank arm only when the crank arm is arranged at the first predetermined relative phase position with respect to the crankshaft, each of the at least one first positioning recess and/or at least one first positioning projection having a larger width in a circumferential direction of the crankshaft than each of the plurality of first projections, and
• the second positioning portion including a plurality of second projections and at least one second positioning recess and/or at least one second positioning projection configured and arranged to engage with at least one projection and/or at least one recess, respectively, of the sprocket only when the sprocket is arranged at the second predetermined relative phase position with respect to the transmission, each of the at least one second positioning recess and/or at least one second positioning projection having a larger width in the circumferential direction of the crankshaft than each of the plurality of second projections,
• the third positioning portion including at least one third recess and/or at least one third projection,
• the transmission including at least one fourth projection and/or at least one fourth recess,
• the at least one third recess and/or the at least one third projection being configured and arranged to engage with the at least one fourth projection and/or the at least one fourth recess, respectively, of the transmission only when the transmission is arranged at the third predetermined relative phase position with respect to the crankshaft, and
• the crankshaft including a hole formed in the first coupling portion, the hole extending in a radial direction of the crankshaft and positioned on one of the at least one first positioning recess and/or at least one first positioning projection of the first positioning portion, the hole being configured to receive a restriction protruding radially inward from the crank arm.