HPI 1/10 scale electric powered, radio controlled, ready-to-run E-Savage Sport Off-Road Monster Truck features, Chassis: Savage style rigid 6061-series aluminum TVP (twin vertical plate) with low battery bays for lower center of gravity and better traction. Drive: Four wheel with sliding driveshafts and safety protected reverse. Radio: HPI TF-1 27MHz 2-channel pistol grip with steering and throttle trim and reverse (transmitter does not have charge jack)heavy duty steering servo. Motors: Two 550 size motors with internal cooling fans to maximize power. Electronic Speed Control: HPI GT 14.4V ESC with failsafe and FASF (Fully Automatic Setup Function). Transmission:Single speed. Ball Bearings: Full set included, 22 total. Shocks: Eight oil-filled, long travel with coil-over spring. Main Gear:66 tooth nylon gear with 20T pinion. Gearbox: Sealed, plastic. Differentials: Geared. Tires: 5.4 x 2.8" (138 x 70mm). Wheels: AR-5 chrome finish 3.5 x 2.2". Body: Highly detailed monster truck. Bumpers: Nylon. Suspension: Non adjustable, double wishbone. Steering Tie Rods: Steel threaded M4x60mm, adjustable. Steering: SF-2 nylon gear servo with servo saver. Warranty: Two year limited, valid only in US, Canada and South America.