3921 69T 48P Spur Gear

Precision machining replicates the exact tooth profile and gear pitch found in full-size racing transmissions to elevate the mechanical authenticity of custom builds. Designed specifically to bridge the gap between various electric platforms and standard 48-pitch gear systems, this component fits a wide compatibility scale of motor setups. Hobbyists can easily pair this gear with custom motor mounts, matching pinion gears, and specialized gear-mesh alignment tools for a complete drivetrain upgrade. The precision-molded material provides a realistic industrial appearance that mimics professional automotive drivetrain hardware used in competitive racing. Seamless compatibility with standard transmission shafts allows builders to integrate this piece into numerous scale vehicle projects without modification. Proper tooth engagement ensures smooth power transfer while preserving the intricate mechanical layout expected by dedicated scale modelers.

Features

• Precision-molded construction ensures optimal gear mesh and long-lasting durability under intense motor loads. The lightweight material prevents excessive rotational mass from slowing down acceleration.

• High-grade composite material protects the tooth surfaces from premature wear and tear during high-speed track sessions while operating quietly. This protective design maintains a reliable mesh over extended run times.

• Standard center hole mounting allows for a secure lock onto various transmission hubs without slipping or wobbling. This reliable mounting mechanism prevents unexpected gear separation during heavy acceleration.

• The 48-pitch tooth profile matches standard transmission configurations for smooth power transmission. This precise geometry reduces operational noise compared to coarser gear alternatives.

• Compact sizing fits neatly inside tight transmission compartments without rubbing against chassis walls or gear covers. This careful clearance design ensures friction-free operation across multiple chassis layouts.

• Molded tooth count markings make it easy to identify gear ratios at a glance during pit maintenance. The clear lettering speeds up gear ratio adjustments in fast-paced racing environments.

• Balanced rotational weight distribution eliminates vibrations that could otherwise damage sensitive transmission bearings over time. This stability promotes efficient energy conversion from the electric motor to the drivetrain.