This is the Traxxas Unassembled TRX-4 4WD Chassis Kit with TQi 2.4 GHz 4-Channel Radio System, Waterproof Electronics, XL-5 HV Electronic Speed Control, and Titan 21T 550 Motor. Choose your own Body, Battery, and Charger (sold separately) to complete your custom ride.
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 remotely locking differentials. All the parts are organized neatly in labeled bags 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.
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.
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.
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.
Features
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.
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.
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.
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)
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.
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.
*Click to See the Full Line of TRX-4 Parts/Accessories
Specifications
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″)
Includes
Unassembled TRX-4 Chassis Kit with Clipless Body Mounting
TQi 2.4 GHz 4-Channel Radio System with 4 Servos
Waterproof XL-5 HV ESC with High Torque Titan 550 Motor
Full-Color Assembly Manual
Requires
Compatible Body
(4) AA batteries for the transmitter
6-7-cell NiMH flat pack or 2-3S LiPo battery
Assembly Tools & Supplies
