Rustler 4X4 Ultimate: 1/10-scale 4WD Stadium Truck. Ready-To-Race with TQi 2.4GHz radio system with Traxxas Stability Management (TSM), Traxxas Link Wireless module, and Velineon Brushless Power System.High-Performance Aluminum Upgrades 6061-T6 aluminum C-hubs 6061-T6 aluminum steering blocks 6061-T6 aluminum rear hub carriers Aluminum chassis stiffener Aluminum axle nuts Clipless ProGraphix Body Easy one-handed removal Reinforced inner cage Strong oversized latch Rugged roof rollover protector Molded composite plastic wing VXL-3s Waterproof Electronic Speed Control Three programmable drive profiles: Sport Mode - Forward / Brake / Reverse Race Mode - Forward / Brake Training Mode - 50% Forward / Brake / 50% Reverse (patented) Traxxas EZ-Set one-button setup Large heat sink Built-in two-stage low-voltage detection for LiPo batteries NiMH battery packs: 6-9 cells (7.2 to 10.8 volts) LiPo battery packs: 2-3 cells (7.4 to 11.1 volts) Velineon Brushless Motor Ultra high-temperature sintered Neodymium magnets Optimized for power and efficiency in 1/10th scale vehicles Low-maintenance, unique Traxxas design Efficient, high-speed ball bearings Precision-balanced rotor 3500 kV Brilliant blue-anodized finish Traxxas Stability Management (TSM) Improves straight line acceleration and braking on low-traction surfaces Maintains steering composure to allow throttle-on powerslides Never dulls throttle or slows the truck Adjusts from off to 100% assistance from the transmitter TQi 2.4 GHz High Output Radio System with Wireless Module Factory-installed telemetry sensors TQi 2-channel transmitter 5-channel micro receiver (6533) with fail-safe security and integrated telemetry ports Compatible with optional TQi Traxxas Link Wireless Module (6511) to access full Traxxas Link app functionality (sold separately) Automatically stores and loads settings for up to 30 Traxxas Link-enabled models Programmable multi-function knob Adjustable steering and throttle percentage (dual rates) Adjustable steering and throttle sensitivity (exponential) Adjustable steering and throttle end points Patented waterproof receiver box Chassis Low-CG design for responsive handling Modular composite tub design Latching battery hold-down Reinforced integrated wheelie bar High-approach front bumper to climb curbs Drivetrain Extreme heavy-duty driveshafts Oil-filled steel gear front and rear differentials Large 32-pitch gearing Torque Control heavy-duty slipper clutch with aluminum pads Anodized-aluminum center driveshaft Steering High-speed metal gear 2075R servo Dual bellcrank design with integrated servo saver Suspension Adjustable front and rear sway bars Adjustable toe and camber links Impact-resistant suspension arm composite Oil-filled Ultra Shocks Captured rod ends won't pop off Rugged front and rear shock towers White powder-coated progressive springs Wheels and Tires Large 2.8" charcoal gray RXT wheels with black chrome beadlock trim 2.8" Gravix tires Sealed Ball BearingsHex hardware with Rust-Resistant Black Oxide CoatingRequires Battery and Charger (Sold Separately)