Optional Side Sliders: Tough Armor Low Profile Side Sliders for Traxxas TRX-4 (Z-S0555) Aluminum Rock Slider Set for Traxxas TRX-4 (Z-S1867) Tough Armor Steel Welded Side Sliders for Traxxas TRX-4 (Z-S1860) Metal Side Sliders for Traxxas TRX-4 Land Rover Defender D110 (VVV-C0470) Rook Metal Side Sliders for Traxxas TRX-4 (VVV-C0448)