Traxxas 78086-4B XRT 8S Brushless Electric X-Truck RTR Blue

Manufacturer: TRAXXAS
Availability: Out of stock
SKU: 78086-4B
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The Traxxas XRT™ fuses race-inspired design and engineering with X-Maxx® power and strength. The result is an all-new platform with sharp reflexes and unprecedented stability that is capable of exploiting the upper range of extreme 8s power and speed.


XRT was engineered with a focus on speed, handling, and performance. XRT’s low center of gravity, ultra-wide stance and low-profile body deliver confidence and control as XRT accelerates across the wide-open spaces to an all-out speed of 60+MPH.


XRT performance and durability begins with its all-metal 8s driveline. Steel 4-gear differentials and steel driveshafts are joined by a high-strength extruded aluminum center shaft. It’s a precision-engineered recipe that has been proven monster-truck tough in the X-Maxx.


XRT’s performance-focused chassis design is configured to lower the center of gravity for superior handling and stability. The dual 6700 4s batteries and the steering servo are positioned to place the weight as low as possible in the chassis and provide protection for these critical components.


XRT’s patent-pending clipless body easily removes and installs in just seconds and yet it locks in place with incredible strength and security. The system uses a cage inside the body to minimize flex while external skids are strategically placed to protect the body.


XRT’s Gravix™ race tires are a revolutionary new hybrid design with densely packed biting edges and sipes. They deliver outstanding grip on hard-packed surfaces along with fast and quiet-running precision.


Already Traxxas’ most powerful speed control, XRT’s VXL-8s™ goes even further with an aggressive tune that maximizes power output across the entire RPM range. More power under the curve delivers mid-range punch that hits hard for rolling wheelies on demand. Bury the throttle at any speed and XRT responds instantly with effortless acceleration.


VXL-8s™ Waterproof Electronic Speed Control

  • Aggressive tuning for more power at any RPM

  • 8s LiPo compatible

  • Built-in cooling fan

  • Real-time telemetry via Traxxas Link

  • Machined heat sinks

  • 10-gauge silicone wire

  • Integrated protection circuits

  • LED status lights

Velineon® 1200XL Brushless Motor

  • “Big Block” brushless motor

  • 4-pole 1275 kV

  • 5mm output shaft

  • Oversize aluminum heatsink for improved cooling

Up to 60+ mph with Two 4s LiPo Batteries and Included Optional Speed Gear

Traxxas Stability Management® (TSM)

  • Improves straight line acceleration and braking on low-traction surfaces

  • Never dulls throttle or slows the truck

  • Adjusts from off to 100% assistance from the transmitter

TQi™ 2.4GHz High Output Radio System

  • TQi™ 2-channel transmitter

  • 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

  • High 13ms frame rate and near-zero latency for responsive control

  • 5-channel micro receiver (#6533) with fail-safe security

  • Patented waterproof receiver box with easy-access plug

X-Maxx® Spec 8s Drivetrain

  • Full-time shaft-driven 4-wheel drive

  • Heavy-duty steel CV driveshafts & axles

  • Splined aluminum center driveshaft

  • Fully machined aluminum stub axles


  • Mod-1 steel pinion and spur gears

  • Fixed gear mesh system

  • Torque-Biasing Center Drive

X-Maxx Spec 8s Differentials

  • Heavy-duty sealed 4-gear design

  • Large scale steel ring and pinion gears

  • Splined outdrives attached with external thru-bolt method

  • Reinforced bulkhead and covers increase bearing support

Rock-Solid Motor Mounting System

  • Precise preset gear mesh adjustments

  • 4 keyed pins lock the motor in place

  • Motor retention separate from gear mesh

GTX Race Shocks

  • Machined aluminum threaded body

  • Extra-large bore and capacity

  • 5.2mm damper shaft

  • Lower seal cartridge includes integrated wiper seal combination

  • Height-adjustable spring retainer

  • Heavy-duty composite shock caps with pivot balls

  • Lower spring perches bolted on

WideMaxx® Suspension

  • Extra-wide suspension arms: Made from heavy-duty cold-weather composite

  • Performance-optimized geometry

  • Double-shear connections

  • High-strength steel suspension pins with retainers

  • 4mm machined pivot balls

  • Fixed high-strength camber and toe links

  • Heavy-duty steering blocks and axle carriers

  • Oversized wheel bearings

Low-CG Chassis Design

Modular chassis with interlocking bulkheads

  • Low center of gravity for improved handling

  • Flat bottom design

  • Heavy-duty interlocking skid plates

  • High-strength buttressing on shock towers

Dual snap-lock battery compartments

  • Protects batteries from side impacts

  • Allows secondary battery-clip security

  • Interlocking components for tight tolerances

  • Wire management for clean appearance

Patent-Pending Clipless Body

  • Snaps in place in just seconds

  • Secure body latches are easy to use

  • Rigid internal frame

  • Dual cold-air intakes

  • Molded body reinforcements for tear-through protection

  • Protective top skids

  • Rugged high-downforce rear wing

Heavy-Duty Bumpers

  • Reinforced front bumper and rear wing support: Absorb impact forces while retaining shape

  • Nerf bars for side impact resistance

  • Heavy-duty wheelie bar with carry handle

Wheels and Tires

7.4" Gravix™ race tires

  • Low sidewall for sharp turn-in response

  • Thick center carcass resists ballooning at high speed

  • Lower rotational mass for faster acceleration

  • 3.8" matte black XRT race wheels

  • High-strength glue and bead design

  • Huge 24mm splined wheel hubs


  • Powerful 365 oz-in steering servo

  • Heavy-duty cam-style servo saver

  • Dirt evacuation channels

  • Fully waterproof

Sealed Ball Bearings

Hex hardware with Rust-Resistant Black Oxide Coating


  • XRT, Ready-To-Race® model with Traxxas Big Block™ brushless motor

  • VXL-8s waterproof electronic speed control with integrated telemetry

  • Quick Start Guide

  • TQi™ 2.4GHz radio system

  • High quality maintenance tools

  • Optional speed gears


LiPo Batteries

  • Traxxas recommends dual 4-Cell, 6700 mAh Power Cell LiPo batteries (part #2890X) or the Dual 4s Completer Pack (Part #2997).

LiPo Balance Charger with iD™

  • Traxxas EZ-Peak® Live 4s-capable charger is recommended for easy and fast charging performance (model #2971).

AA Alkaline Batteries

  • Four AA alkaline batteries for the transmitter.

Truck Specs

  • Length (including wing): 31.41 inches (798mm)

  • Front Track: 23.43 inches (595mm)

  • Rear Track: 23.43 inches (595mm)

  • Ground Clearance: 1.93 inches (49mm)

  • Weight: 19.70 pounds (8.94kgs) - without body, 21.03 pounds (9.54kgs) - with body, 23.87 pounds (10.83kgs) - with body & two 4s 6700mAh LiPos

  • Height: 10.15 inches (258mm) - ride height, 12.12 inches (308mm) - full droop

  • Wheelbase: 18.9 inches (480mm)

  • Shock Length (front): 6.79 inches (173mm)

  • Shock Length (rear): 6.79 inches (173mm)

  • Tires (Pre-Glued): 7.4 x 3.8 inches (188mm x 97mm)

  • Wheels: 4.3 x 5.7 inches (110mm x 147mm)

  • Speed Control: Velineon® VXL-8s

  • Motor (electric): Velineon® 1200XL Brushless with heat sink and dual fan shrouds

  • Overall Drive Ratio: 20.6:1 (20/50 motor pinion and spur gear)

  • Differential Type: Sealed, hardened steel bevel, limited slip

  • Gear Pitch (Spur and Pinion): Module 1.0

  • Chassis Structure/Material: Composite Nylon Tub

  • Brake Type: Electronic

  • Drive System: Shaft-driven 4WD

  • Steering: Bellcrank

  • Radio System: TQi™ 2.4GHz Transmitter with TSM® receiver™

  • Servo: Torque: 365oz. Speed: 0.17 sec/ 60 degrees(6.0V)

  • Top Speed: 60+ MPH with two 4s LiPo batteries and included optional gearing

  • Skill Level: 5

  • Battery Tray: 186mm x 51mm x 44mm

  • Required Batteries: 4 “AA” (transmitter) and 4-cell LiPo battery (x2)

Motor Specs

  • Type: 1275 kv Sensorless Brushless

  • Weight: 665g (23.44oz)

  • Length: 4.32 inches (110mm)

  • Diameter: 1.88 inches (48mm)

  • Connector Type: Traxxas 6.5mm Bullet Connectors

ESC Specs

  • Input Voltage: 8s LiPo (Max 33.6 Volts)

  • Case Size: 2.23in (58mm) / 2.83in (72mm) / 1.81in (46mm)

  • Weight: 215.5g (7.60oz)

  • BEC Voltage: 6.0 V

  • BEC Current Continuous: 10 A

  • BEC Current Peak: 20 A

  • Motor Connectors: Traxxas 6.5mm Bullet Connectors

  • Battery Connectors: Traxxas High-Current Connectors

  • Power Wire: 10-gauge Maxx Cable

  • Ports: RX Input, Auxiliary Fan, Traxxas Accessory Port