The Unlimited Desert Racer combines Pro-Scale™ performance with extreme 6s power for the most thrilling RC driving experience possible. It drives like a real desert truck because it’s engineered like a real desert truck. A 4-link solid rear axle provides huge suspension travel with authentic driving dynamics. From the cantilever sway bars and high-voltage lighting system to the GTR shocks, Traxxas accurately reproduced a true desert racer in both form and function.

6S EXTREME POWER

The 50+ mph UDR delivers its pro-level performance with brutal 6s power. The VXL-6s ESC combines massive power handling with high-tech telemetry features. An ultra-tough drivetrain harnesses the extreme power to make it easy to control and fun to drive.

DRIVING REALISM

The Traxxas UDR™ is engineered on an authentic, true to scale 4-wheel drive desert race truck chassis. The 4-link solid rear axle design provides huge suspension travel with authentic driving dynamics. From the cantilever sway bars to the 8 GTR shocks, Traxxas has accurately reproduced a true unlimited desert race chassis in both form and function.

PRO-SCALE® PERFORMANCE

Pro-Scale is a new Traxxas innovation that captures true-scale realism and combines it with extreme 6s LiPo power and 50+ mph performance. The Traxxas Unlimited Desert Racer faithfully captures the look and feel of Trophy Trucks and Unlimited Trick Trucks as they charge hard across the desert at full speed.

INNOVATION

Explore these key features to see how every design element on the Unlimited Desert Racer combines to create an authentic and thrilling driving experience.

Contents

• Unlimited Desert Racer with VXL-6s ESC and 2200kV motor
• Quick Start Guide
• TQi™ 2.4GHz radio system
• High quality maintenance tools

Requires

Batteries

Unlimited Desert Racer accepts a single 4s LiPo battery or dual 2s LiPo batteries or dual 3s LiPo batteries

Charger

Traxxas EZ-Peak Live charger (2971) is recommended for easy and fast charging performance

AA Alkaline Batteries

Four AA alkaline batteries for the transmitter

VIDEO

MODEL 85086-4: Unlimited Desert Racer Pro-Scale® 4WD Race Truck, Ready-To-Race® with Traxxas Stability Management®, with TQi™ 2.4GHz Radio System, VXL-6s Brushless Power System, and Licensed Race Replica painted body

High-Voltage LED Lights

• Dual straight LED bumper-mounted LED light bars (52 LEDs each)
• Curved roof light bar (52 LEDs)
• Multifunction red and amber brake light/class light bar
• High-voltage 8-channel power amplifier for intense, brilliant LED lighting
• Regulated output for stable lighting performance
• (no flickering or dimming as the battery voltage changes)

VXL-6s Waterproof Electronic Speed Control

• 6s LiPo compatible
• Integrated cooling fan
• Real-time telemetry via Traxxas Link
• Machined heat sink
• 3-LED status indicators
• Powered accessory ports
• 10-gauge silicone wire

Velineon 2200kV Brushless Motor

• 4-pole 2200kV brushless motor
• 5mm output shaft
• Finned can for better heat dissipation

Up to 50+ mph with Two 3s LiPo Batteries
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

Innovative Battery Compartment

• Accommodates single 4-cell LiPo or dual 2-cell or 3-cell LiPo batteries
• Opens from underneath without removing body
• Fixed oversized battery strap locks batteries securely into place
• Separate skid plate to protect batteries

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

Large Pro-Scale Body with Highly Detailed Replica Parts

• Heavy-duty truck body mounts to chassis in multiple locations
• Strong and functional tube frame mimics full-size off-road racers
• Detailed interior cabin with driver figures
• Replica brake calipers and discs with integrated 17mm wheel hubs
• Two fully-functional spare tires and functional spare driveshaft
• Highly detailed replica parts: fire extinguishers, shock reservoirs, jack, and tools
• Realistic side plates mount to tube frame

Chassis

• Composite inverted tub design
• Makes maintenance easier
• Lowers center of gravity (CG) for improved handling
• Allows easy access to components
• Tough skid plates protect critical components
• Fully integrated tube frame for scale appearance and added rigidity
• Reinforced bumpers to absorb impacts
• ESC battery plugs hard mounted to chassis

Suspension

• Provides scale looks and authentic off-road driving dynamics
• Tough independent double-wishbone front suspension with captured rod ends
• Triangulated 4-link rear suspension with solid rear axle (patent pending)
• Tough composite trailing arms
• Steel upper links with 3 optional positions for suspension tuning
• Eight long-travel aluminum GTR shocks; four with springs and adjustable ride height collars
• Realistic and functional front and rear sway bars
• Detailed functional limit straps on rear axle

Steering

• Chassis mounted #2075R metal-gear servo
• Dual bellcrank design with bearings and integrated servo saver
• Solid non-adjustable steering links for rugged durability

Drivetrain

• Steel CV driveshafts (front) with 6mm stub axles
• Steel straight axle (rear)
• Oil-filled limited slip front differential
• Locked steel spool (rear)
• Heavy-duty splined front driveshaft
• Fixed-length steel rear driveshaft

Transmission

• All-steel gear direct drive transmission
• Torque-Biasing Center Drive™
• Removes as a single piece for easy maintenance
• Fixed-pin gear mesh system

Wheels and Tires

• Replica BFGoodrich® KR3 off-road tires
• Beadlock-style 17mm dual-diameter wheels

Sealed Ball Bearings
Hex Hardware with Rust-Resistant Black Oxide Coating