This is the 1/10 scale electric powered, radio controlled, ready to run, Traxxas Grinder Monster Truck. Part of the Monster Jam Replica Series. FEATURES: Chassis: Composite nylon tub style Drive: Rear wheel with telescoping universal-joint driveshafts Motor: Traxxas Titan modified 12 turn 550 with internal cooling fan Radio: Traxxas TQ 27MHz AM 2-channel pistol grip with high-torque waterproof steering servo, 4-channel micro receiver ESC: XL-5 with reverse and training mode Transmission: Brushless ready Magnum 272 metal gear transmission with rubber sealed ball bearings, and Revo-spec Torque-Control slipper clutch Differential: Planetary gear Pinion Gears: Two 48 pitch, 19 tooth is installed, 23 tooth included for higher top speeds Battery: Traxxas Power Cell 3000mAh 8.4V 7-cell hump with high- current connector Battery Charger: 110V AC wall type Body: Painted and trimmed Advance Auto Parts Grinder Shocks: Oil-filled Ultra Steering; Single point Suspension: Long travel Differential: Steel planetary gears, brushless ready Tires: 2.8" (71mm) wide Monster Jam (no foam inserts) Wheels: Beadlock style Monster Jam INCLUDES: RTR Traxxas Grinder Monster Truck, AM radio, 12 turn motor, ESC, painted body, 19 and 23 tooth pinion gears, decals and instruction manual REQUIRES: AA Batteries: Eight for transmitter SPECS: Vehicle- Length: 16.25" (413mm) Front and Rear Track: 12.75" (324mm) distance between outer edges of tires side to side Weight: 65.3oz (1.85kg) Maximum Height: 9.5" (234mm) Wheelbase: 10.63" (270mm) Ground Clearance: 4" (102mm) Body- Length: 16.1" (408mm) Width: 6.4" (164mm) at rear wheels, widest point 4.9" (125mm) at center section, narrowest point Height: 4.6" (117mm) COMMENTS: The Grinder is available in the following 27MHz channels; A2 TRAD34A2 A5 TRAD34A5 A4 TRAD34A4 A6 TRAD34A6 The bodies are licensed, so color and paint schemes are the same for all channels. For replacement or to upgrade to Ball Bearings use: Quantity Size Location Order Stock Number 4 5x11mm Front Hubs 2 DTXC1547 4 5x11mm Rear Hubs 2 DTXC1547 6 5x11mm Transmission 3 DTXC1547 jxs 01/24/11 ir/jxs