ARRMA Main Input 12T Spiral RC Gear - ARA310912 Bearing Kit or has a compromised seal

or has a compromised seal

It's a direct Traxxas spare part designed to restore or replicate the factory rollbar flatbed configuration on compatible TRX-4 builds

Appropriate Traxxas hex driver or ball-end Allen keys for installation

this is a straightforward bolt-on addition

ARRMA Main Input 12T Spiral RC Gear - ARA310912 Bearing Kit or has a compromised sealThe ARRMA ARA310912 Main Input Gear 12T Spiral is a genuine ARRMA spare part designed as a direct fit replacement for the input gear in compatible ARRMA brushless RC vehicles. This 12 tooth spiral cut gear sits at the heart of the drivetrain, transferring power from the motor to the transmission, and keeping your RC car running after hard use or a drivetrain failure. Key Features 12 tooth spiral cut gear profile for smooth, consistent power transfer