Traxxas 5122R Chassis, 6061-T6 aluminum (4.0mm) (blue) (standard replacement for all Maxx® series)

The replacement 4 mm aluminum T-Maxx^® Classic chassis is formed from durable 6061-T6 aluminum and then anodized in beautiful blue. Besides forming a rigid backbone for the rest of the truck, the aluminum acts like a heat sink to draw additional heat away from the engine.