This is the 1/10 scale, radio controlled, electric powered, ready to run SCX10 Rock Crawler Truck from Axial Racing. hassis: Rigid steel C-channel, tapered for increased articulation and added realism Drive: Four wheel shaft drive Radio: 2-channel 27MHz pistol grip ESC: AE-1 Forward/Reverse ESC Motor: 27T 540 size Shocks: Oil filled, with dual rate springs and oil reservoir Tires: Pro-Line Flat Iron, (PROC1166) 1.9" (48.3mm) inner diameter 1.5" (38mm) wide with foam inserts Wheels: Beadlock chrome 1.9" (48.3mm) diameter, 0.87" (22mm) wide Ball Bearings: Full set enclosed Spur Gear: Plastic 48 pitch, 87 tooth Pinion Gear: Steel 48 pitch, 14 tooth REQUIRES: AA Batteries: Eight for transmitter 7.2V 6-cell Stick Battery Pack and Battery Charger Building and Track Equipment SPECS: Vehicle; Width: 9" (227mm) Height: 5.9" (150mm) Wheelbase: 11.4" (290mm) Ground Clearance: 3" (75mm) Gear Ratio: 47.80:1 Body; Length: 18.5" (470mm) Width: 7.25" (184mm) Height: 6.25" (159mm)