TRX-4 Technology and Innovation-Now Available as a Kit!
TRX-4® set the standard for off-road versatility with its radical design and rugged durability. The TRX-4 chassis kit combines the same innovative features as the RTR vehicle with the fun and excitement of building your own kit. Build your own portal axles, high/low range transmission, and remote-locking differentials. All the parts are organized neatly in labeled bags along with waterproof electronics and pre-assembled shocks and suspension links. A fully illustrated color manual makes the kit as much fun to construct as it is to take off-road.
Easy Assembly Instructions
The TRX-4 Chassis Kit includes a full-color instruction book that’s easy to follow and fun to use. Each section corresponds to a labeled bag with step-by-step assembly instructions. True-to-scale part illustrations and ruler charts make it easy to differentiate between different screws, bearings, and gears.
Ready to Assemble
The TRX-4 Chassis Kit arrives ready to assemble with a full-color instruction guide, TQi™ 4-channel 2.4 GHz radio system, and complete waterproof electronics including servos, XL-5™ HV ESC, and Titan® 21T motor. Key parts like shocks and suspension links come pre-assembled to make building easy and fun.
Clipless Body Mounting
Clipless body mounting makes it easy to customize your TRX-4 kit with any accessory Traxxas 312 mm wheelbase body (sold separately). The hidden latching system provides clean, flowing lines for maximum scale realism. On the trail the clipless body holds tight when you need it, but releases in just seconds to access the chassis.
AVAILABLE NOW
Model #82216-4$399.95
Details
Clipless Convenience
The TRX-4 chassis kit accepts a wide variety of 312 mm Traxxas clipless bodies (sold separately). TRX-4’s heavy-duty clipless body mounts integrate into its rugged inner fenders to form a vise-like grip. When it’s time to release the body, simply reach under the fender and pull the tabs. It’s that easy.
Heavy-Duty Frame Rails
A thick 1.5 mm 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.
High/Low Range Transmission
When the going gets tough, use your transmitter to shift into low range for incredible 4-wheel drive pulling torque. Shift into high range for blasting down the trail.
Canyon Trail 1.9″ Tires
The 1.9″ Canyon Trail tires and tuned foam inserts are super-soft and grippy to deliver superior bite on rocky surfaces with convincing scale realism. A 12 mm steel hex drives the wheels.
Aluminum GTS Shocks
Innovative oil-filled coil-over GTS shocks deliver silky-smooth damping performance and feature threaded shock bodies, an O-ring cap seal, and dual X-ring shaft seals.
The Power of Portals
Build your own game-changing portal axles with the TRX-4 Chassis Kit. These innovative axles lift the chassis at the wheels for huge center pumpkin ground clearance. In order to achieve the same clearance with straight axles (and not get stuck) your tires would need to be over an inch taller than the TRX-4’s. Straddling boulders with ease, the TRX-4 chassis takes the path less traveled and leaves everything else behind.
Torque Twist Eliminated
Total axle gear reduction with portals is over twice non-portal designs, virtually eliminating torque twist. Titan 550 motor torque is translated into straight, powerful, forward motion.
Scale Detail
TRX-4's bumpers provide clearance and rugged protection against rocks and feature authentic recovery D-rings. The front bumper is designed to be compatible with many popular off-road accessories.
Titan 21T 550 Motor
Torque rules the trail! TRX-4’s massive Titan 21-turn 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.
3s Power System
The XL-5 HV electronic speed control brings 3s LiPo capability and trail-tuned profiles. A Trail profile facilitates smooth driving for most of your adventures, while a new Crawl profile introduces hill hold and instant reverse for extremely technical courses. Long run times, up to 2 hours, are possible with a Traxxas 3s 5000 mAh iD® LiPo battery pack! (Battery not included)
T-Lock Remote Locking Differentials
Traxxas gives you the freedom and versatility to lock and unlock both of the patented front and rear T-Lock differentials to suit your driving needs, all controlled remotely from your transmitter.
Metal Gear Digital Servo
A full-metal gear digital servo gives you the durability and steering authority you need to confidently and reliably power through tough situations.
Extreme Capability
Steep approach angles front and rear allow the TRX-4 crawler to tackle big obstacles head on. The front motor design biases weight forward for superior climbing ability.
Improved Geometry
Portal axles raise the axle link mounts, center driveshaft, steering drag link, and the tie rod up and out of harm’s way. Center ground clearance is increased while critical driveshaft and suspension link angles are reduced.
Traxxas Tough
The Traxxas TRX-4 chassis is built to handle the rigors of remote locations and all-day driving fun. The foundation begins with a pair of 1.5 mm thick steel frame rails. Large diameter steel links and heavy-duty, extra-wide rod ends keep the suspension firmly mounted. Hardened steel u-joints are ultra reliable, while the brushless-ready steel portal axle and transfer case gears are smooth and quiet.
Waterproof Electronics
The TRX-4 crawler is fully waterproof. Only Traxxas’ patented innovation gives you the freedom to tackle creeks, snow, and mud without worrying about water in your electronics.
Inner Fenders
Detailed inner fenders feature clipless body mounts and integrate with the floor pans and shock towers, keeping rocks, mud, and twigs out of the chassis. The inner fenders are also equipped to install our optional LED rock light kit (sold separately).
Cruise Control
Set your speed using the transmitter and then fine-tune it with the Multi-Function knob to precisely match the pace of your caravan of trail explorers. The TRX-4 is your companion for hours of driving fun and exploration.
45° Steering Angle
With the front differential unlocked, the superior 45° steering angle negotiates around even the tightest bends with ease. This helps avoid awkward reversing maneuvers in tight spaces.
Sealed Ball Bearings and Hex Hardware
Black sealed ball bearings resist mud and dirt to keep your rig rolling smoothly. TRX-4’s hex-drive hardware provides a more positive and secure connection than other fasteners. The black-oxide coating provides a rust resistant high-tech look and feel.
Photo Gallery
Make sure you don’t miss any of the latest TRX-4 news, accessories, and updates.
TRX-4® Data
| Length: | 20.57 inches (523 mm) |
|---|---|
| Front Track: | 9.78 inches (249 mm) |
| Rear Track: | 9.78 inches (249 mm) |
| Ground Clearance: | 3.14 inches (80 mm) |
| Weight: | 102.72 ounces (2.91 kg) |
| Height: | 10.47 inches (266 mm) |
| Wheelbase: | 12.28 inches (312 mm) |
| Shock Length (front): | 3.54 inches (90 mm) |
| Shock Length (rear): | 3.54 inches (90 mm) |
| Approach Angle: | 63.82° |
| Departure Angle: | 43.22° |
| Breakover Angle: | 59° |
| Front Wheels: | 1.9 x 1.02 inches (49 x 26 mm) |
| Rear Wheels: | 1.9 x 1.02 inches (49 x 26 mm) |
| Front Tires: | 4.64 x 1.89 inches (118 x 48 mm) |
| Rear Tires: | 4.64 x 1.89 inches (118 x 48 mm) |
| Wheel Hex: | 12 mm |
| Speed Control: | XL-5™ HV ESC |
| Motor (electric): | Titan® 21T reverse rotation |
| Differential Type: | 4 gear, remote locking |
| Transmission: | 2-speed high/low, remote shifting |
| Gear Pitch: | 32 |
| Chassis Structure/Material: | Steel ladder frame with Nylon composite cross members |
| Brake Type: | Electronic “Hill Hold” |
| Drive System: | Shaft-driven 4WD |
| Steering: | Chassis mounted 2075X metal gear servo |
| Radio System: | TQi™ 2.4 GHz 4-channel transmitter with 6533 receiver |
| Skill Level: | 2 |
| Battery Tray (L/W/H): | 159 mm (6.26″) x 47 mm (1.85″) x 23/26 mm (0.91″/1.02″) |
| Type: | High-torque brushed motor |
|---|---|
| Size: | 550 |
| Weight: | 13.76 ounces (390 g) |
| Length: | 3.071″ (78 mm) overall length, 2.25″ (57 mm) can length, 1.532″ (39 mm diameter) |
| Turns: | 21T reverse rotation |
| Voltage: | 16.8 volts |
| Input Voltage: | 6–7 Cells NiMH, 2–3s LiPo |
|---|---|
| Case Size: | 1.23″ W x 2.18″ D x 1.04″ H |
| Weight: | 2.6 ounces (74 g) |
| Motor Limit: | 21-turns (550 size) |
| On Resistance Forward: | 0.004 ohms |
| On Resistance Reverse: | 0.004 ohms |
| Peak Current - Forward: | 100 amps |
| Peak Current - Reverse: | 100 amps |
| Braking Current: | 60 amps |
| Continuous Current: | 18 amps |
| BEC Voltage: | 6.0 volts |
| BEC Current: | 1 amp |
| Power Wire: | 14 gauge / 5″ |
| Input Harness Wire: | 26 gauge / 14.5″ |
| Transistor Type: | MOSFET |
| PWM Frequency: | 1700 Hz |
| Low Voltage Detection (LVD): | 2-Stage indicators, switchable (on or off) |
| Thermal Protection: | Thermal shutdown |
| Profile selection: |
|
| Single-button setup: | Traxxas EZ-Set® |
| * Patented | |
- Easy to follow full-color assembly manual
- True-to-scale part illustrations and ruler charts
- Helpful assembly tips and clear illustrations
- 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 (7.2–8.4 V) and 2–3s LiPo (7.4–11.1 V)
- Two stage low voltage protection (LVD)
- Powerful Titan™ 21T reverse rotation motor
- Internal cooling fan
- Precise, preset gear mesh adjustments
- Motor retention separate from gear mesh
- Rigid Steel Frame
- 1.5 mm thick steel frame rails increase torsional rigidity
- Innovative design allows four wheelbase positions (300 mm, 312 mm, 324 mm, 336 mm)
- Adjustable rear shock tower positions
- Bumpers adjust fore and aft
- Rugged rock rails adjust for width
- Wire routing clips integrated into frame rails
- Steering
- Chassis mounted 2075X metal gear digital servo
- Superior 45° steering angle
- Direct steering (no servo saver)
- Steering geometry corrected for bump steer
- Portal Axles
- Increase ground clearance (3.14″)
- Eliminate torque twist
- Steel gears
- Improve axle geometry and reduce strain on driveshafts
- Drivetrain
- Full-time shaft driven 4-wheel drive
- Tough 6 mm stub axles
- Steel front CV driveshafts
- Hardened steel rear axle shafts
- Remote locking steel gear differentials with cable-actuation
- Steel gear transfer case
- Innovative Battery Compartments
- 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)
- Secondary battery mount over front axle for forward weight bias
- Two speed high/low range transmission with remote shifting
- Dual horizontal shafts
- Twin friction plate slipper clutch
- Easily removed for servicing
- Pre-assembled aluminum GTS Shocks
- 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
- Shock oil included in kit
- Suspension
- Front — 3 link with panhard
- Rear — Triangulated 4 link
- Pre-assembled heavy-duty rod ends with steel hollow balls
- 5 mm diameter steel link rods with 4 mm threaded ends
- Wheels and Tires
- 1.9″ Canyon Trail tires with trail-tuned foam inserts
- Tough black scale wheels
- Trail tuned S1 rubber compound
- 12 mm steel hex
- Tire glue required
- TQi™ 2.4 GHz 4-channel transmitter
- Traxxas Link™ enabled
- Telemetry ready 6533 5-channel micro receiver with failsafe
- Automatically stores and loads settings for up to 30 Traxxas Link enabled models
- Exclusive Cruise Control feature for extended trail driving
- Adjustable steering and throttle sensitivity (exponential)
- Adjustable steering and throttle endpoints
- High 13 ms frame rate and near-zero latency for responsive control
- 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:
- T-Lock Front And Rear Differentials
- Two-Speed Transmission
- XL-5 HV Power System
- TQi Radio System with Servos
- Full Color, Detailed Assembly Instructions
What You’ll Need:
- Batteries
TRX-4 accepts a wide variety of NiMH and LiPo batteries.
- Charger
Traxxas EZ-Peak® charger is recommended for easy and fast charging performance (model 2971).
- AA Alkaline Batteries
Four AA alkaline batteries for the transmitter.