so expansion is as simple as clicking new track into place

Official Pro-Line logo embossed on sidewall of tire

This is a genuine Traxxas front left axle shaft with drive pin for the Traxxas TRX-4

Main connector: EC3

that you didn't have before due to the tall posts included with this system

Arrma AR320457 Bumper Set Outcast NSR so expansion is as simpleArrma AR320457 Bumper Set Outcast Description Genuine ARRMA front and rear bumper set designed as a direct replacement for select 1 10 Outcast 4S stunt trucks. Manufactured from tough composite material, these bumpers provide long lasting vehicle protection and increased impact resistance during demanding RC use. The matte black finish and molded ARRMA logo maintain the vehicles factory appearance. Features Genuine ARRMA replacement part Orderable