A spoke for a tension wheel, the spoke being made of a composite material and including a tension body, the body having a median portion and two ends, the body being extended beyond each end by a fastening segment, the body and the fastening segments being connected by a transitional zone. The spoke has at least one portion with a cross-sectional surface reinforced relative to the cross section of the median portion, the reinforced cross-sectional portion extending through at least one transitional zone between the tension body and the embedded fastening segment.