This rear hub and knuckle arm is manufactured for TAMIYA TT01 series chassis as a metal replacement for the stock plastic unit. The red finish provides a durable contact surface and improves repeatability at the rear suspension mounting points.
Compatibility is limited to TT01, TT01E and TT01ED platforms. The component interfaces with the original wheel hubs, uprights, and fasteners, retaining the chassis suspension geometry.
Installation uses the standard procedure: remove the factory hub assembly, install the alloy hub/knuckle arm in the same orientation, and secure with existing fasteners to factory torque. After fitting, check wheel alignment and hub rotation to ensure correct operation. The part serves as a maintenance and durability upgrade rather than a structural redesign.
As a practical upgrade it reduces plastic wear, offers a consistent mounting surface, and helps keep rear wheel alignment stable during repeated running.