The Power of Portals
Build your own game-changing TRX-4^® 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.

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
All new 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.

Scale Detail

The rugged bumpers provide clearance and protection and are equipped with recovery D-rings. The front bumper is designed to be compatible with many popular off-road accessories.

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.

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.

Metal Gear Digital Servo
A new 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 Scale and Trail® 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.

3s Power System
The new XL-5 HV electronic speed control brings 3S LiPo capability and new profiles. A new 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 5000mAh iD LiPo battery pack! (Battery not included)

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
The TRX-4 Scale and Trail® 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 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.

Rigid Steel Frame
A heavy-duty formed-steel ladder frame with molded cross members creates an extremely rigid backbone. The elimination of chassis flex allows for precise wheel placement when navigating technical terrain.

Unparalleled Traxxas Support
Unparalleled Traxxas support comes standard with every Traxxas model. Traxxas offers the most extensive product support base in the industry and provides unrivaled parts availability. TRX-4 parts and service are available from a network of nearly 2000 hobby dealers worldwide. Nobody works harder than Traxxas to be accessible to you. We have friendly toll-free phone support that's available from 8:30am to 9pm central time weekdays. Just call 1-888-TRAXXAS. We also offer e-mail support anytime at support@Traxxas.com. Traxxas models are about experiencing total performance and satisfaction, not just in the products, but also with the company that stands behind them.

MODEL 82016-4: Unassembled TRX-4 Chassis Kit, TQi™ 2.4GHz 4-Channel Radio System, XL-5 HV Electronic Speed Control, and Titan^® 21T 550 motor. Requires: Body, Battery, and Charger.