Castle Creations 21T MOD1 Pinion, 5mm Shaft (M-CC6512)

The Castle Creations Pinion - 21 Tooth - MOD1 - 5mm Shaft is a straightforward upgrade or replacement for RC drivetrains that use MOD1 gearing. With 21 teeth and a 5mm bore, this pinion gear is intended to pair with MOD1 spur gears to achieve accurate gear mesh in RC models.

Selecting a 21T pinion affects the final drive ratio: compared with lower tooth counts it generally provides higher potential top speed with a trade-off in acceleration. As with any gearing change, ensure correct mesh and monitor drivetrain temperatures and performance.

Key Details

• Brand: Castle Creations
• Part Number: M-CC6512
• Tooth Count: 21T
• Module: MOD1
• Shaft Diameter: 5mm

Suggested Compatibility

• 5mm motor shafts
• MOD1 spur gears