Unlimited Desert Racer
UDR Lights On UDR Lights Off
Scale replicas of fire extinguishers, the cockpit, and two functional spare tires lying flat side-by-side

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.

Unlimited Desert Racer kicking up a huge dust cloud

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.

VXL-6s speed control alongside the 2200 kV brushless motor

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.

Pro Scale Desert Realism

Model 85086-4 $749.95



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


Beneath the Unlimited Desert Racer’s tough exterior and beautifully sculpted, fully-integrated tube frame chassis are the keys to its thrilling performance. Peer beneath the skin to discover what lies at the heart of this revolutionary new off-road vehicle.
UDR-Details-Body BFGoodrich® Tires and Wheels Fixed One-Piece Body Pro Scale® Body Detailed Interior Molded Body Details Functional Spare Tires UDR-Details-Chassis Heavy-duty Front Suspension Dual Bellcrank Steering Rugged Tube Cage Protective Skid Plates Realistic Side Plates New Long-Travel GTR Shocks Realistic Sway Bars Suspension Limiter Straps Reinforced Bumpers UDR-Details-Cutaway Maxx-Scale Differentials Maxx-Duty Front CV driveshafts Waterproof Receiver Box Torque-Biasing Center Drive Fixed Gear Mesh 2200 kV Brushless Motor Pro Scale® Driveshafts New VXL-6s ESC Solid Rear Axle

Make sure you don’t miss any of the latest Traxxas Unlimited Desert Racer news, accessories, and updates.

Unlimited Desert Racer Data

Unlimited Desert Racer
Unlimited Desert Racer
Length: 27.32 inches (694 mm)
Front Track: 13.57 inches (345 mm)
Rear Track: 13.57 inches (345 mm)
Ground Clearance: 2.27 inches (58 mm)
Weight: 13.4 pounds (6.1 kg)
Height: 10.29 inches (261 mm)
Wheelbase: 16.53 inches (420 mm)
Front Shock Length: 5.28 inches (134 mm)
Front Threaded Shock Length: 5.28 inches (134 mm)
Rear Shock Length: 6.3 inches (160 mm)
Rear Threaded Shock Length: 5.55 inches (139 mm)
Tires (pre-glued): 134 mm x 57 mm BFGoodrich® KR3 replicas
Wheels: dual diameter 40 mm x 56/81 mm
Speed Control: Velineon® VXL-6s
Motor (electric): 2200 kV
Transmission: Direct-drive with Torque-Biasing Center Drive
Overall Drive Ratio: 17.89:1
Front Differential Type: Sealed, 4-gear
Rear Differential Type: Locked spool
Center Differential Type: Sealed, 4-gear (1M weight oil)
Chassis Structure / Material: Inverted composite tub
Brake Type: Electronic
Drive System: Shaft driven 4WD
Steering: Dual bellcranks with ball bearings
Radio System: TQi 2-channel transmitter with 6533 TSM receiver
Servo: 2075R Metal Gear
Top Speed (stock gearing): 4s LiPo – 30+ mph, 6s LiPo – 50+ mph
Skill Level: 5
Battery Compartment: 181 mm x 46 mm x 56 mm
Type: Sensorless brushless
Weight: 14.32 ounces (406 g)
Length: 2.97 inches (76 mm)
Diameter: 1.65 inches (42 mm)
Connector Type: Traxxas 6.5 mm bullet connectors
Input Voltage (cells): 4s–6s LiPo (max: 25.2 volts)
Case Size: 2.28″ (58 mm) x 2.83″ (72 mm) x 1.81″ (46 mm)
Weight: 7.30 ounces (207 g)
BEC Voltage: 6.0 volts
BEC Current Continuous: 10 amps
BEC Current Peak: 20 amps
Reverse Delay: Yes, with lockout
Low Voltage Detection (LVD): Yes, programmable
Ports: RX Input, Auxiliary Fan, Accessory Port
  • 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® 2200 kV Brushless Motor
    • 4-pole 2200 kV brushless motor
    • 5 mm 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 2.4 GHz 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
    • 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 17 mm 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 6 mm 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 17 mm dual-diameter wheels
  • Sealed Ball Bearings
  • Hex Hardware with Rust-Resistant Black Oxide Coating
Unlimited Desert Racer
Unlimited Desert Racer
MODEL 85086-4: Unlimited Desert Racer Pro Scale® 4WD race truck, Ready-To-Race® with TSM®, with TQi 2.4 GHz radio system, VXL-6s brushless power system, and licensed race replica painted body

What’s In The Box:

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

What You’ll Need: