Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Race Truck (Fox) w/LED Lights & TQi 2.4GHz Radio

Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Race Truck (Fox)
Out Of Stock Online
Expected to ship Friday, October 16 2020

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Price: $729.95

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This is the Traxxas Unlimited Desert Racer "Fox" Style UDR 6S RTR 4WD Electric Race Truck, along with TQi 2.4GHz Radio & LED Lights is Race Truck is a true to scale 4-wheel drive desert race truck. 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. Attention to detail captures the look and feel of Trophy Trucks and Unlimited Trick Trucks as they charge hard across the desert at full speed.

The performance of this versatile race truck is now complemented by a high-intensity light from the rugged waterproof LED lighting system. A high-voltage amplifier powers 204 individual LEDs for brilliant light while tightly regulating the voltage to eliminate flickering and dimming. The rear light bar features class lights and smart brake lights that work when brakes are applied in either direction.



  • 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
  • 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
  • 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
  • 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 #2075X metal-gear servo
    • Dual bellcrank design with bearings and integrated servo saver
    • Solid non-adjustable steering links for rugged durability
  • Drivetrain
    • Steel CVDs (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
  • 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)

 27.32 inches (694mm)  
Front Track: 13.57 inches (345mm)  
Rear Track: 13.57 inches (345mm)  
Ground Clearance: 2.27 inches (58mm)  
Weight: 13.4lb (6.1kg)  
Height: 10.29 inches (261mm)  
Wheelbase: 16.53 inches (420mm)  
Front Shock Length: 5.28 inches (134mm)  
Front Threaded Shock Length: 5.28 inches (134mm)  
Rear Shock Length: 6.3 inches (160mm)  
Rear Threaded Shock Length: 5.55 inches (139mm)  
Tires (pre-glued): 134mm x 57mm BFGoodrich® KR3 replicas  
Wheels: dual diameter 40mm x 56/81mm  
Speed Control: Velineon® VXL-6s  
Motor (electric): 2200kV


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

Needed to Complete:  

  • Single 4s LiPo battery or dual 2s LiPo batteries or dual 3s LiPo batteries with Traxxas iD connector
  • Traxxas EZ-Peak Live charger
  • (4) AA alkaline batteries for the transmitter

This product is expected to arrive on Friday, October 16 2020

Verified Owner
Monday, Jan 6 2020 (9 months ago)
Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Race Truck (Fox)
If you want a scale and realistic truck, this is definitely the one to go. For the price, it isn't bad. Yes, I know it's more than 700 bucks without the batteries, but there are many scale accessories that come with it. On the back, there are fire extinguishers (red cylinders on the back of the truck), fans, shock reservoirs (between the fire extinguisher and fans), quarts of oil (gray), batteries (black, left and right of the quarts of oil), and best of all functional driveshaft, and two tires. I also really like the driver figures inside, which really makes it look like a real trophy truck. Some other things that I like about the truck is the suspension and design of this truck. The truck has eight shocks, with four normal, and four with internal springs, which absorb the rough terrain perfectly, and acts just like a real trophy truck. Even when the body is taken off, it looks like a real one, with the roll cage, and panels on it. While jumping it, I love seeing the rear axle drop down and cushion it's landing, and from far away, it really does look like a real trophy truck. To some people, a 1/10th scale short course truck (like the slash) seems very similar to it, but the driving and handling experience is completely different. While driving it, you can feel its weight shifting around when it turns, and you can see it lean back when you accelerate and lean forward when you brake. It's pretty awesome. The lights on this thing is also pretty amazing, especially the brake lights. Even on low beam, the front light bars are very bright (so bright to the point you can use low beam during night time and see perfectly fine). Terrain wise, this truck handles pretty good on grass, dirt, and gravel, but is a bit tippy on asphalt (also concrete) because of its solid rear axle. The sway bars help a little but doesn’t prevent tipping. The turning angle of this is nice, but its turning radius is also made larger by the solid axle (which sort of annoys me, since I sometimes run it indoors). If you want to drive this mainly indoor, I suggest a 1/10th scale at the largest (maybe Losi's Ford Raptor Baja Rey for something similar with an open rear differential). Even though this truck one of the best, there are some weak points that I would like to point out: the servo that it has for steering is not the best, and doesn’t steer to the endpoints on carpet. Sometimes even on asphalt, you can see it sort of struggle. I’m not really sure why Traxxas even put this servo in this truck because it is even weak for a TRX 4 (1/10th crawler), so I think having a stronger servo would be great. Overall, I think this is by far the best truck in my RC collection, and that Traxxas did a great job with this truck.

If you don’t really want to read the gigantic paragraph above, here’s a more simplified summary for you:

- Scale, with some functional accessories
- Like a real 1:1 trophy truck
- Long travel and cushiony suspension
- Eight shocks
- Great light bar with functional brake light
- Handles great on grass, dirt, gravel, and sand
- Has sway bars
- Nice turning angle

- Pricey for people new to the hobby, but has ok value (Could be lower priced)
- Locked rear axle sometimes make it hard to turn
- Locked rear axle also makes it more tippy
- Weak servo

If you’re still reading this, here’s some more fun facts about this truck:
- 4wd
- Takes lipo batteries up to 6s (but I think 4s is already sufficient)
- Bolt-on body with 12 screws
- Bottom-feed battery
- All-metal drive train

I hope you found this review helpful!
Verified Owner
Thursday, Dec 26 2019 (9 months ago)
Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Race Truck (Fox)
Truck is Great! All the right stuff but ordered accessories to make it just a little better and realistic. It may end up a little heavier but still perform great. These trucks are so realistic when making jumps.
Verified Owner
Thursday, Feb 13 2020 (7 months ago)
Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Race Truck (Fox)
Great pro scale well built model. This is not a toy its very reliable and takes skill to maneuver. It will crash and roll over if you operate the model like a normal truck or other traxxas models. Its very fast and has the ability to tackle any kind of terrain surface. On pavement its very tippy and catches and flips over very easily if you do not get on the throttle and swing the rear end around like a desert racer truck woukd do. Its fun and good on battery wether you run 4s to 6s its just as good on 4s.
Verified Owner
Saturday, Apr 4 2020 (6 months ago)
Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Race Truck (Fox)
Awesome truck only problem was twisted front drive shaft in two on aecond outting no biggie gsm metal driveshaft back in business more fun than a barrel of monkies sorry gpm driveshaft and also love the ilink if u plan on keeping the transmitter that comes w it turns ur phone into telemtry readout for 35 bucks