they're a factory-correct fit for the 22 4

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Machined Billet Aluminum

All-new Ground up Design for Maximum Performance

Arrma ARA310963 16T Mod1 Safe-D5 Pinion Gear Kraton 8S 1/7 Felony 6S ET410 Parts they're a factory-correct fit forARRMA ARA310963 16T Mod1 Safe D5 Pinion Gear Dial in your gearing with this genuine ARA310963 16 tooth Mod1 pinion gear. Machined from tough steel for long lasting performance in extreme conditions, it uses the Safe D5 (5mm) bore for a secure, slip free fit on the motor shaft. A direct fit replacement or gearing option for your ARRMA. Features Machined from tough steel for extreme conditions 16 tooth (16T) Mod1 pitch pinion gear Safe D5 (5mm) bore for