The Serpent 421027 pinion gear is a direct replacement designed for S240 electric pancar racers who want reliable tooth engagement and clean power transfer. Its 8-tooth profile helps the drivetrain run smoothly under load while keeping gearing changes predictable for race tuning.
Made to fit the Serpent S240 family, this pinion integrates with standard S240 spur gears without modification. Its sturdy build supports frequent track use and provides a consistent feel lap after lap.
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