This is a Hot Racing CNC machined hardened steel 25T pinion gear for use on 1/8 scale cars or 1/10 scale cars that can use Mod-1 gearing.
Length: 12mm (0.47 in)
Inner Diameter: 5mm (0.20 in)
1x 21T Mod-1 Pinion Gear
1x 4x4mm Set Screw
Requires a 2mm hex wrench to install the set screw.
This gear is designed for 5mm or 1/8 shaft with 5mm to 1/8 conversion sleeve.