This is the Radio Controlled, Electric Powered, 1/10 scale SCT410 4x4 Short Course Truck Kit from Tekno RC. FEATURES: Chassis: CNC aluminum 0.16" (4mm) thick, anodized black in color with short front and rear overhang for better bump handling and jump landing, adjustable front, center, and rear chassis braces for fine tuning flex Drive: Four wheel shaft drive with CVDs with captured pins Motor Mount: Two-piece CNC aluminum with dual clamping gear mesh adjustment Differentials: Bevel gear Bumpers: Front and rear Shocks: Oil-filled 16mm bore hard anodized with conical piston design for varied compression and rebound rates, 4mm diameter steel shafts Shock Towers: CNC aluminum 0.16" (4mm) thick Suspension: Adjustable long travel design with adjustable length rear arms, and adjustable front arm sweep and angle, front and rear sway bars Steering: Ball bearing supported, narrow pivot posts, adjustable bump-steer and Ackerman, Ackerman describes the effect of the inside front wheel turning faster than the outside front wheel during turns 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 front and rear, camber refers to the angle of the tops of the tires from vertical when viewed from front or behind vehicle Battery Tray: 2.0x5.8" (50x148mm) INCLUDES: SCT410 4x4 Kit with Shocks, Shock and Diff Oil, Decals and Instructions REQUIRES: Radio: 2-channel with high torque steering servo Motor: Tekin Pro4 brushless short course motor recommended Pinion Gear: 11-30 tooth Tekno RC MOD1 TKR4171-TKR4190 recommended OR Tekno RC Traktion Drive/Electri-Clutch System (TKRC4306) Electronic Speed Control: Compatible with selected motor Battery: 2S LiPo Battery Charger: Compatible with selected battery Wheels: Short course type with 12mm hex Tires: Short course Building and track equipment SPECS: Length: 20.87" (530mm) Width: 11.65" (296mm) Wheelbase: 12.7-13.2" (323-335mm) Weight: 6.6lbs (3000g) ready to run, approximately Differential Ratio: F/R 10-40t, center 44t COMMENTS: For Replacement Ball Bearings use: Qty. Size Location Qty. Bearing Set 6 8x16mm Fr, R & Ctr Diff 3 DTXC1585 2 5x11mm Front Gearbox 1 DTXC1547 2 5x11mm Rear Gearbox 1 DTXC1547 2 10x15mm Rear Hubs 1 DTXC1595 2 6x12mm Rear Hubs 1 DTXC1569 2 10x15mm Front Hubs 1 DTXC1595 2 6x12mm Front Hubs 1 DTXC1569 4 6x10mm Steering 2 DTXC1561 jxs 01/29/13 ir/jxs