Differential Type: Sealed, hardened steel bevel, limited slip Gear Pitch: Module 1.0 Chassis Structure/Material: Composite Modular Tub Brake Type: Electronic Drive System: Shaft-driven 4WD Steering: Double-shear bellcrank Wheels & Tires: 2.8” wheels, pre-glued Sledgehammer® Tires & foam inserts; 5.6x2.8–3.6 Radio System: 2-Channel, TQi™ 2.4GHz Transmitter with TSM® receiver Servo: Torque: 285oz-in. Top Speed: 60+ MPH with 4S LiPo battery and optional gearing (sold separately) Skill Level: 4 Battery Tray: 186mm L x 48mm W x 43mm H Required Batteries: 4 “AA” (transmitter)