HPI Racing 21T (48DP) RC Pinion Gear - HPI6921

The HPI Racing HPI6921 21T Pinion Gear is a 48DP pitch pinion gear designed for use in HPI Racing RC cars and compatible electric drivetrains. Pinion gears are a core part of the drivetrain, transmitting power from the motor shaft to the spur gear, and selecting the right tooth count directly affects your gear ratio, top speed, and motor temperature. The 21-tooth configuration sits in a mid-range position on the gearing spectrum, making it a practical choice for balancing acceleration and outright speed across a variety of running conditions.

Key Features

• 21-tooth pinion gear with 48DP (diametral pitch) tooth profile, ensuring correct mesh with compatible 48DP spur gears
• Suited to electric RC drivetrains where a 48DP pinion is required
• Mid-range tooth count — higher tooth counts increase top speed, lower tooth counts improve acceleration and reduce motor load
• Direct replacement for worn or damaged pinion gears in compatible HPI Racing models
• Part number HPI6921 for precise identification when ordering spares

Compatible With

• HPI Racing models specifying a 48DP pinion gear
• Electric RC drivetrains using a 48DP spur gear mesh
• Note: Verify your model's required pinion pitch and motor shaft diameter before fitting — consult your model's manual or parts list to confirm HPI6921 compatibility

What's Included

• 1x HPI Racing 21T 48DP Pinion Gear (HPI6921)