This 20-tooth hard steel drive gear is supplied as a single pair and serves as a replacement for worn SCX10 factory gears. The increased hardness helps resist wear when the model is used for serious scale crawling and low-speed hauling.
The gear transmits torque from the motor pinion into the axle and spur assembly and is a key driveline element. For scale crawlers and trail rigs, a hardened-steel drive gear will better withstand prolonged low-speed loads compared with softer stock parts.
Fitment advice: confirm tooth mesh and backlash after installation, inspect mating pinion and spur for wear before reuse, and ensure the gear thoroughly seats on its shaft. Renew bearings or retaining components if any play is detected to preserve driveline reliability.
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