This is the Electric Powered, Radio Controlled 1/10 Scale DESC410v2 Pro Spec 4WD Short Course Truck Kit. FEATURES: Chassis: Aluminum 0.12" (3mm) thick with aluminum upper chassis rails and composite chassis spacers Drive: Four wheel shaft Spur Gears: 48DP for controlled class racing, and Module-1 for 550- 4-pole motor usage Differentials: Front and rear with super heavy duty machine cut 42T ring gears and center slipper-diff that combines diff and slipper clutch in one unit Shocks: Big bore, aluminum body, oil filled with additional blank pistons for fine tuning Shock Towers: Molded composite Suspension: Machined aluminum hangers with molded composite inserts on the rear hanger for multiple anti-squat settings, front and rear sway bars Motor Mount: CNC aluminum Wheels: 3" (76.2mm) diameter, 1.6" (41mm) wide, white in color Bumpers: Molded composite Caster: Adjustable, caster/toe-in refers to the angle of the front suspension when viewed from the side of the car in relation to the chassis Camber: Adjustable, camber refers to the angle of the tops of the tires from vertical when viewed from front or behind vehicle INCLUDES: DESC410v2 Pro Spec 4WD SC Kit, Shocks, Wheels, 48DP Spur Gear, Mod-1 Spur Gear, Instruction Manual REQUIRES: Radio: 2-channel with high-torque steering servo Motor: 540 or 550 size Pinion Gear: Number of teeth to be determined by motor Body: 1/10 scale short course Battery: 2S LiPo saddle pack Battery Charger: For selected battery Tires: Short course Building and track equipment, silicone shock and diff oil SPECS: Length: 21.9" (550mm) Width: 11.2" (285mm) Wheelbase: 13.0 - 13.2" (329 - 336mm) adjustable Weight: 95.2oz (2700g) approximately Internal Gear Ratio: 2.47:1 COMMENTS: For Replacement Ball Bearings use: Qty. Size Location Qty. Bearing Set 2 10x15mm Fr Diff Case 1 DTXC1595 1 12x18mm Diff Plate 1 DTXC1597 2 10x15mm Fr Diff Case 1 DTXC1595 2 5x10mm Center Driveshaft 1 DTXC1535 4 4x7mm Steering 2 DTXC1507 2 10x15mm Fr Hubs 1 DTXC1595 2 5x11mm Fr Hubs 1 DTXC1547 2 10x15mm Rear Hubs 1 DTXC1595 2 5x11mm Rear Hubs 1 DTXC1547 jxs 07/18/12 ir/jxs