The ornamental design for spoke segment of a vehiclewheel, as shown and described.
FIG. 1 is a perspective view of a spoke segment of a vehicle wheel according to my new design; and,
FIG. 2 is a front elevational view thereof.
The broken line showing of the bolt holes and rear of the rim is included for the purpose of illustrating environment and forms no part of the claimed design. The broken lines on either side of the spoke segment are for the purpose of illustrating the boundary of the claimed design and form no part thereof.