This is an optional 58T (0.8 Metric Pitch) spur gear from Traxxas. This gear mounts to the input shaft of the transmission, and meshes with the pinion gear on the clutch bell.
Traxxas 3958 58T Spur Gear (0.8 Metric Pitch)
SKU: 020334395801
$3.00Price
.png){kind=logo}