Associated Electronics 90003 B5M Team Kit Narrowed hard anodized aluminum chassis with centralized mass and mid-motor position for improved handling on high grip off road tracks Chassis accepts R.O.A.R.-approved 2S saddle packs and 2S short packs using the additional foam insert Factory Team V2 12mm Big Bore threaded aluminum shocks with 3mm shock shafts and updated O-rings for improved smoothness Factory Team VTS (Variable Torque multi-plate Slipper) with three drive surfaces and high-resolution spring New transmission has stronger gears, precision ball bearings, and a 14 carbide ball differential for increased life and torque capacity FEATURES: Chassis: Aluminum, fits ROAR approved 2S saddle and short packs using the included foam insert Drive: Rear wheel Transmission: New design ha INCLUDES: Associated RC10 B5M Factory Team off-road buggy kit, body with wing decals, wheels, shock oil and instruction manual REQUIRES: Radio: Two-channel with high-speed servo Radio Batteries: (8) AA size Tires of racer's choice Pinion Gear: Number of teeth to be determined