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Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Electric Race Truck w/TQi 2.4GHz Radio (Rigid Industries)

Please be aware that pricing and product availability in-store may vary from what’s available online because each store is independently owned and operated.
This item is discontinued and no longer available for purchase. It has been replaced by TRA85086-4-FOX.
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Alkaline Batteries
$4.19 - Fuji EnviroMAX AA Super Alkaline Battery (4) (details...)
Low Price: $679.95
Discontinued Online

The Traxxas Unlimited Desert Racer "Rigid Industries" Race Truck 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 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.

6s Extreme Power
The 50+ mph Unlimited Desert Racer 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.


  • 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

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

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 was added to our catalog on April 20, 2018

Verified Owner
Saturday, Jun 2 2018 (about a year ago)
Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Electric Race Truck
This truck is a beast!!! I haven't found an area to run it full throttle for more than a second or two. I hit a concrete curb at a good clip with the rearend and this truck could have cared less. Flipped it several times and a few barrel rolls and no damage except some scratches. Watch YouTube videos on how to care for this thing recommend everydayrc videos . Suspension just soaks up bumps like a champ . Just soooo much power at your fingertips that it can get away from you in a hurry. And it will!!! I love it ,I painted all the scale bits and it came alive just sitting there. Had an issue with one of the batteries I ordered with it and called traxxas and they made good on it fast so traxxas has done me no wrong yet. So its durable and fast as all get out and is beautiful. Cool factor is off the charts .
Verified Owner
Saturday, Sep 28 2019 (4 months ago)
Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Electric Race Truck
The udr is an amazing truck. It's very fast, and handles amazing for a solid rear axle truck. With that said. The udr is not a basher. If you buy it thinking you can jump it like a xmaxx, you will be disappointed. If you buy it for what it is, and run it how it was meant to be ran. You will have an absolute blast with it.
Verified Owner
Wednesday, Sep 11 2019 (4 months ago)
Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Electric Race Truck
It's a beautiful scale truck that runs great out of the box, but don't let it fool you. It's definitely not a basher. Within the first 3 packs I busted a front driveshaft, rear lower trailing arm, and a mid shaft. These seem to be common parts that are not up to the task of running hard. These pieces were broken on flat ground. I do understand that you can't build an indestructible truck, but the broken parts were a surprise. Other then that it has been the most fun I've had with an RC. This thing drives so much different then anything else I have owned. I wish there was something like this when I started out. I probably would have saved a ton of money trying to find the go-to scaler.
Friday, Jan 11 2019 (about a year ago)
Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Electric Race Truck
Very good machine! I use it to race on ice very agile rig! Tire are to hard to race on ice! But no choice only one market so we do with it!On 4s no power! I change the connector for xt90 very easy! When I received it the body was crack around the lower bolts and then they send me a new one ! Very good service! I purchased mine from great hobbies in Canada! I love it!¡
Wednesday, Nov 21 2018 (about a year ago)
Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Electric Race Truck
I've owned this truck now for 5 months now and haven't had any problems. I live in the Nevada desert and it's right at home on the desert terrain of rock sand and dirt, I run it all out on 4s which is plenty fast on this terrain and the 118 degree heat this summer didn't bother it ether, it's just a great truck and I love it! When I get done playing with it it's so dirty you can't tell what color it is, I bring it home take the body off squirt it down with cleaner from the 99 cent store and put it in the shower and give it a good cleaning and it's ready for next time!
Wednesday, Dec 18 2019 (4 weeks ago)
Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Electric Race Truck
J’adore cette voiturette même si le prix est un peu exorbitif
Verified Owner
Friday, Jun 21 2019 (7 months ago)
Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Electric Race Truck
It's a great car, but after the first run the tire came off the bead, now I have to contact traxxas... bummer
Saturday, Jun 15 2019 (7 months ago)
Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Electric Race Truck
I bought this truck and spent near $1000 to only be able to use it for 20 minuets. The first 20 minutes were me getting used to the controller but then the rear differential seized up and melted the plastic making it un drivable. It’s an amazing truck just that issue that happened on the first run!
Friday, Feb 23 2018 (about a year ago)
Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Electric Race Truck
Saturday, Feb 17 2018 (about a year ago)
Traxxas Unlimited Desert Racer UDR 6S RTR 4WD Electric Race Truck
I would like to review this product when it is available. I would like to do a YouTube unboxing and first driving video. Also do a blog on like and dislikes I’m provements and such but can be persuaded to a full detail like all around which in sure with all traxxas products they are always 100% legit and fun and they are always up grading and working on designs can’t wait for this one tho the latest and greatest. Please just give me a shot if you dare. Thank you for your consideration.