39T Mod1 Safe-D5 Pinion Gear (ARA311134)

This 39-tooth Mod1 Safe-D5 pinion gear is a tough steel gear designed for 5mm motor shafts in RC vehicles, delivering durable, smooth power transfer under demanding conditions.

It features a D-shaped hole that matches the motor shaft profile for secure engagement, plus a precisely threaded set-screw hole. The package includes an M4 x 4mm set screw and a 3.2mm E-clip to keep the pinion firmly attached to the shaft during aggressive use.