Purpose Built
The TRX-4 Sport combines the unbeatable ground clearance and driving dynamics of Traxxas portal axles, sticky Canyon® Trail tires, and a lightweight pickup truck body for a leaner, performance-focused new TRX-4. The Sport’s unique bumpers, wheels, and body were designed for increased climbing versatility. Whether it’s a fun trail run or a hardcore technical crawl, the TRX-4 Sport’s capability and performance-built approach takes your outdoor adventure to a new level.
$369.95
TRX-4 Sport Videos
Innovation
Outfitted with radically innovative technology, the TRX-4 Sport minimizes weight to maximize performance.
Details
The key to the TRX-4 Sport’s performance lies underneath its lightweight body.
Heavy-Duty Steel Frame Rails
Adjustable Wheelbase
Molded Wire Retainers
Dual Battery Tray
Floor Pans
Aluminum Scale Shocks
Heavy-Duty Steel Links
Precision Hex Hardware
Heavy-Duty Steel Frame Rails
A thick 1.5mm steel ladder frame with molded cross members provides exceptional torsional rigidity to resist even the worst chassis twisting articulation. This extremely rigid backbone lets the suspension do the work it was designed to do. You’ll feel the difference on trails where the elimination of chassis flex allows for precise wheel placement when navigating technical terrain.
Adjustable Wheelbase
The innovative shock towers allow four separate “bolt-on” wheelbase positions: 300, 312, 324, and 336mm to accommodate custom body fitment. Further fine tuning is possible with the axle links and adjustable shock position.
Molded Wire Retainers
The finer details matter so we incorporated wire retainers into the frame rails, which provide a clean look and keep the wiring more secure from off-road hazards.
Dual Battery Tray
TRX-4’s main battery tray accommodates a full-length 5000mAh 3-cell LiPo or 7600mAh 2-cell LiPo for extended run times or smaller 1/16 scale Traxxas batteries for reduced weight. A hinged battery strap provides quick and secure battery mounting without pins to lose in the field. The innovative strap flips over to adjust for different height batteries.
Floor Pans
Tough floor pans protect the electronics and enhance the scale appearance of the chassis.
Aluminum Scale Shocks
Oil-filled coil-over GTS shocks were created exclusively for the TRX-4 chassis to smooth out even the roughest trails. These silver-anodized aluminum shocks deliver silky-smooth damping and feature threaded bodies for easy ride height adjustment. The convincing scale realism looks great and they perform even better with an O-ring cap seal and dual X-ring shaft seals.
Heavy-Duty Steel Links
Thick 5mm diameter steel links feature tough, fully-captured heavy-duty rod ends with steel hollow balls for exceptional strength and durability. This is one rig that won’t strand you on the trail with a broken suspension link.
Precision Hex Hardware
The TRX-4 uses tough hex hardware throughout for improved strength and easy servicing. For extreme environments, consider using the Stainless Steel Hardware Kit (#8298).
Portal Axles
Torque Twist Eliminated
Locked Differentials
Steel Gear Transmission
Hardened Steel U-Joints
Twin Friction Plate Slipper Clutch
Sealed Ball Bearings
Portal Axles
Exclusive to TRX-4 models, portal axles lift the differential pumpkin to provide incredible ground clearance. This radical design also improves axle geometry and reduces strain on the driveshafts. Steel gears ensure trouble-free performance, no matter how technical the climb.
Torque Twist Eliminated
On conventional rigs with the limited gear reduction in the differentials, motor torque is applied to the frame to the point of twisting you right off the rocks. The TRX-4’s radical portal axle design reduces the gear ratio at the wheels, virtually eliminating torque twist through the chassis. Total axle gear reduction is over twice non-portal designs so Titan motor torque delivers smooth forward motion, not frame twist.
Locked Differentials
Full-time locked front and rear differentials transform the motor’s torque into unstoppable climbing action. With no slippage possible, all four wheels claw with equal traction, powering the lightweight Sport over the toughest obstacles.
Steel Gear Transmission
The single-speed transmission is geared low for the raw torque required to scale the steepest grades. Steel gears provide the Traxxas-Tough durability that keeps you on the trail.
Hardened Steel U-Joints
Hardened steel U-joints on the front and rear driveshafts provide smooth, reliable power delivery for non-stop fun.
Twin Friction Plate Slipper Clutch
A twin friction plate slipper clutch provides some additional protection from motor stalls in extreme crawling conditions.
Sealed Ball Bearings
Black sealed ball bearings resist mud and dirt to keep your rig rolling smoothly.
Raised Center Driveshafts and Suspension Links
High Steering and Drag Links
45-Degree Steering Angle
Extreme Approach Angles
High Ground Clearance
Front Motor Design
Raised Center Driveshafts and Suspension Links
TRX-4’s radical portal axle design raises the driveshafts higher to improve axle geometry and reduce driveshaft angles. Higher driveshafts and suspension links pass over obstacles to avoid high-centering your truck and reduce overall grinding wear.
High Steering and Drag Links
The steering link and drag link attach high on the portal axles, raising them away from possible damage. This allows the TRX-4 to attack obstacles head on, reducing the risk of hitting the steering linkage on rocks.
45-Degree Steering Angle
The superior 45-degree steering angle negotiates around even the tightest bends with ease. This helps avoid awkward reversing maneuvers in tight spaces.
Extreme Approach Angles
With a 58.82 degree out-of-box approach angle in the front, TRX-4 is ready to climb walls. An equally impressive 45.83 degree rear approach angle provides extreme capability, even in the deepest ruts.
High Ground Clearance
Portal axles help raise the center ground clearance to an unparalleled 3.14 inches (80mm), while raised suspension links and driveshafts clear the rocks underneath. Superior capability equals more fun no matter where your adventure takes you.
Front Motor Design
The TRX-4’s large 550 size brushed 21-turn Titan motor provides smooth reliable power and loads of torque to climb the toughest obstacles. The front mounted orientation moves the weight bias forward to get you up and over obstacles with improved traction.
New XL-5 HV ESC
Titan 21T 550 Motor
Waterproof Metal Gear Servo
TQ™ 2-Channel Radio System
New XL-5 HV ESC
HV stands for compatibility with the high-voltage 3s LiPo battery packs for greater efficiency and power. In addition to the three standard profiles (Sport, Race, Training Mode®), the XL-5 HV features a Trail profile that serves up a little bit of drag brake for smooth intuitive driving for most of your adventures. A new Crawl profile introduces hill hold and instant reverse for extremely technical courses. Either will help you navigate the trail with ease.
Titan 21T 550 Motor
Torque rules the trail! The TRX-4’s massive Titan 21T motor pumps out huge torque to get you up and over anything that gets in the way. An integrated cooling fan keeps temperatures down for extended run times.
Waterproof Metal Gear Servo
A new full-metal gear digital servo gives you the durability and steering authority you need to confidently and reliably power through tough challenges.
TQ™ 2-Channel Radio System
Switch on the power and drive! That’s all there is to it with the TQ™ 2.4GHz radio system. Race multiple vehicles side by side without interference. The TQ’s advanced programming provides long-range control with smooth, glitch-free performance and it fits comfortably in the hand for extended use.
Accessories
A wide range of performance and adventure accessories are available to transform your TRX-4 Sport into a highly detailed Scale and Trail® crawler. Accessories sold separately.View all accessories
- Clear and Painted Bodies
- Expedition Rack
- Auxilliary Exterior LED Lighting for the Roof, Bumper, and Expedition Rack
- Traction Boards
- Side View Mirrors
- Molded Inner Fenders
- Snorkel
- Spare Tire Mount
- Bolt-on Headlights and Tail Lights
- Shovel, Axe, Jack & More!
Photo Gallery
Make sure you don’t miss any of the latest Traxxas TRX-4 Sport news, accessories, and updates.
TRX-4 Sport Data
| Length: | 21.93 inches (557mm) |
|---|---|
| Front Track: | 9.78 inches (249mm) |
| Rear Track: | 9.78 inches (249mm) |
| Ground Clearance: | 3.14 inches (80mm) |
| Weight: | 5.79lb (2.63kg) |
| Height: | 9.47 inches (241mm) |
| Wheelbase: | 12.28 inches (312mm) |
| Approach Angle: | 58.82° |
| Departure Angle: | 45.83° |
| Breakover Angle: | 59° |
| Front Shock Length: | 3.54 inches (90mm) |
| Rear Shock Length: | 3.54 inches (90mm) |
| Front Wheels: | 1.9 x 1.02 inches (49 x 26mm) |
| Rear Wheels: | 1.9 x 1.02 inches (49 x 26mm) |
| Front Tires: | 4.64 x 1.89 inches (118 x 48mm) |
| Rear Tires: | 4.64 x 1.89 inches (118 x 48mm) |
| Hex Size: | 12mm |
| Speed Control: | XL-5 HV |
| Motor (electric): | 21T Reverse Rotation |
| Transmission: | Single Speed |
| Gear Pitch: | 32P |
| Differential Type: | Spool (no differential) |
| Chassis Structure / Material: | Steel Ladder Frame with Nylon Composite Crossmembers |
| Brake Type: | Electronic “Hill Hold” |
| Drive System: | Shaft Driven 4WD |
| Steering: | Chassis Mounted Servo |
| Servo: | 2075X Metal Gear |
| Transmitter: | TQ™ 2.4GHz 2-Channel Transmitter |
| Receiver: | 6519 |
| Skill Level: | 1 |
| Battery Tray: | 158.75 L x 47 W x 23/26mm H |
| Type: | High-torque brushed motor |
|---|---|
| Size: | 550 |
| Weight: | 390g (13.76oz) |
| Length: | 3.071” (78mm) overall length, 2.25” (57mm) can length, 1.532” (38.9mm diameter) |
| Turns: | 21T reverse rotation |
| Voltage: | 16.8V |
| Input Voltage: | 6–7 Cells NiMH, 2–3s LiPo |
|---|---|
| Case Size: | 1.23” W x 2.18” D x 1.04” H |
| Weight: | 2.6oz (74g) |
| Motor Limit: | 21-turns (550 size) |
| On Resistance Forward: | 0.004 Ohms |
| On Resistance Reverse: | 0.004 Ohms |
| Peak Current - Forward: | 100A |
| Peak Current - Reverse: | 100A |
| Braking Current: | 60A |
| Continuous Current: | 18A |
| BEC Voltage: | 6.0 VDC |
| BEC Current: | 1A |
| Power Wire: | 14 Gauge / 5” |
| Input Harness Wire: | 26 Gauge / 14.5” |
| Transistor Type: | MOSFET |
| PWM Frequency: | 1700Hz |
| Low Voltage Detection (LVD): | 2-Stage indicators, switchable (on or off) |
| Thermal Protection: | Thermal Shutdown |
| Profile selection: |
|
| Single-button setup: | Yes, Traxxas EZ-Set® |
| * Patented | |
- Tough, Lightweight Pickup Truck Body
- Low profile bumpers for increased clearance
- Red differential covers and D-rings
- Trail-Tuned XL-5 HV Waterproof Electronic Speed Control
- Fully waterproof design
- Five drive profiles
- Sport Mode — forward / brake / reverse
- Race Mode — forward / brake / no reverse
- Training Mode™ — 50% forward / 100% brake / 50% reverse (patented)
- Trail Mode — forward / brake / reverse / with trail-tuned drag brake in neutral
- Crawl Mode — forward / instant reverse - no neutral with 100% hill holding brake
- Traxxas EZ-Set® one-button setup
- Large, efficient heat sink
- Wide voltage latitude 6–7 cell NiMH (7.2–8.4V) and 2–3s LiPo (7.4–11.1V)
- Two stage low voltage protection (LVD)
- Motor
- Powerful Titan™ 21T reverse rotation motor with internal cooling fan
- Precise preset gear mesh adjustments
- Motor retention separate from gear mesh
- Portal Axles
- Increase ground clearance
- Eliminate torque twist
- Steel gears
- Improve axle geometry and reduce strain on driveshafts
- Rigid Steel Frame
- 1.5mm thick steel frame rails increase torsional rigidity
- Innovative design allows four wheelbase positions (300mm, 312mm, 324mm, 336mm)
- Adjustable rear shock tower positions for SWB and LWB configurations
- Bumpers adjust fore and aft
- Rugged rock rails adjust for width
- Wire routing clips integrated into frame rails
- Drivetrain
- Full-time shaft driven 4-wheel drive
- Tough 6mm stub axles
- Steel front CV driveshafts
- Hardened steel rear axle shafts
- Spool-locked front and rear differentials
- Steel gear transfer case
- Innovative Battery Compartment
- Hinged battery strap allows quick and easy battery access
- No pins to lose
- Accommodates different height batteries
- Accepts full-size long battery packs
- Integrated compartment accepts smaller 1/16 scale batteries (with optional strap)
- Transmission
- Single-speed with steel gears
- Dual horizontal shafts
- Twin friction plate slipper clutch
- Easily removed for servicing
- Steering
- Chassis mounted 2075X metal gear digital servo
- Superior 45° steering angle
- Direct steering (no servo saver)
- Steering geometry corrected for bump steer
- Suspension
- Front — 3 link with panhard
- Rear — triangulated 4 link
- Heavy-duty rod ends with steel hollow balls
- 5mm diameter steel link rods with 4mm threaded ends
- Aluminum GTS Shocks
- Oil-filled coilover GTS shocks exclusive to TRX-4 chassis
- Silver-anodized aluminum bodies
- Threaded bodies with collars easily adjust ride height
- Silky smooth damping for the toughest trails
- O-ring cap seal and dual X-ring shaft seals
- Wheels and Tires
- Rugged black 5-spoke wheels
- Pre-mounted 1.9” Canyon Trail tires with trail-tuned foam inserts
- Trail tuned S1 rubber compound
- 12mm steel hex
- TQ™ 2.4GHz 2-channel transmitter
- Patented O-Ring Sealed Watertight Receiver Box Keeps the Micro Receiver Dry
- Sealed Ball Bearings
- Hex Hardware with Rust-Resistant Black Oxide Coating
What’s In The Box:
- TRX-4, Ready-To-Drive® model
- XL-5 HV waterproof electronic speed control
- Titan™ 21T reverse rotation motor
- TQ™ 2.4GHz radio system
- High quality maintenance tools
What You’ll Need:
- Batteries
TRX-4 accepts a wide variety of NiMH (4–7 cell) and LiPo (2s–3s) batteries.
- Charger
Traxxas EZ-Peak Live charger is recommended for easy and fast charging performance (model #2971).
- AA Alkaline Batteries
Four AA alkaline batteries for the transmitter.