Traxxas TRX-4® 1/10 Scale Trail Rock Crawler Assembly Kit w/TQi™ 2.4GHz Radio
About this part
Tough Rugged Scale Trail Kit
The TRX-4® 1/10 Scale Trail Rock Crawler Assembly Kit offers an exciting hands-on experience, combining the thrill of off-road performance with the satisfaction of assembling your vehicle. Known for its rugged durability and innovative design, the TRX-4 set the standard for off-road versatility, and this kit version includes the same advanced features as the ready-to-run (RTR) model. Enthusiasts can build key components like portal axles, a high/low range transmission, and remotely locking differentials, gaining a deeper understanding of the vehicle’s mechanics. The kit is well-organized, with all parts neatly packed in labeled bags, including waterproof electronics and pre-assembled shocks and suspension links for convenience. A fully illustrated, color manual ensures a smooth and enjoyable building process, making this kit just as fun to construct as it is to tackle rough terrain.
About the TRX-4 Kit
Drivetrain
The full-time shaft-driven 4-wheel-drive system is designed for performance in off-road conditions. It features large six-millimeter stub axles, steel front CV driveshafts, and hardened steel rear axle shafts, ensuring strength and reliability under any terrain. The system includes remote-locking steel gear differentials (T-Lock) with cable actuation, allowing for traction adjustments. The steel-geared transfer case enhances power distribution, while portal axles provide multiple benefits, including increased ground clearance, eliminating torque twist for better stability, and optimizing axle geometry that reduces strain on the driveshafts. With steel gears throughout, the drivetrain is engineered for durability, ensuring long-lasting performance in extreme terrains.
2-Speed Transmission
The two-speed high/low range transmission with remote shifting allows for seamless transitions between high speed and low torque settings. Its design incorporates dual horizontal shafts for balanced power transfer and durability. A twin-friction plate slipper clutch is integrated to protect the drivetrain by preventing excessive wear to the spur gear. Additionally, the transmission is designed for easy removal, simplifying maintenance. This combination of features enhances the vehicle’s versatility, durability, and overall performance in demanding off-road conditions.
Shocks and Suspension
The suspension system is engineered for durability and smooth performance on tough trails. It features pre-assembled aluminum GTS coilover shocks, designed exclusively for the TRX-4 chassis. These shocks have anodized, threaded aluminum bodies with adjustable collars, allowing for easy ride height tuning. Their silky-smooth damping, aided by an O-ring cap seal and dual X-ring shaft seals, ensures consistent performance, and they come pre-filled with shock oil for convenience. The front suspension utilizes a 3-link setup with a panhard bar for stability and precise steering, while the rear features a triangulated 4-link design for optimal articulation and traction. Heavy-duty rod ends with hollow steel balls combined with five-millimeter steel link rods featuring four-millimeter threaded ends provide exceptional strength and durability, making the system highly capable of handling extreme off-road conditions.
Features:
- Remote-shifting high and low 2-speed transmission
- Remote-locking front and rear differentials
- TQi™ 2.4GHz 4-channel radio system with four servos
- Waterproof XL-5™ HV ESC with high torque Titan® 550 motor
- Full-color assembly manual
- Clipless body system for easy removal of factory bodies
- Portal axles for improved ground clearence
- 3-link front suspension with pan hard bar
- Hinged battery strap allows quick and easy battery access
- O-Ring sealed watertight receiver box keeps the receiver dry
Includes:
- (1) Traxxas TRX-4 1/10 Scale Trail Rock Crawler Chassis
- (1) TQi™ 2.4GHz 4-Channel Radio System
- (1) 21T High Torque Titan® 550Motor
- (1) XL-5 HV ESC w/Traxxas iD Plug
- (1) 2075X Metal Gear Digital Servo
- (4) 2065 Shift Servos
- (4) Canyon Trail 1.9in Tires w/Foam Inserts
- (4) 1.9in Tough Scale Wheels
- Product Manual
Needed To Complete:
- (1) 12.3in (312mm) Rock Crawler Body
- (1) 6-7 Cell NiMH or 2-3S LiPo Battery (7.2-11.1V) w/Traxxas iD Plug
- (1) Compatible Battery Charger
- (4) AA Alkaline Batteries
Specifications:
| Scale | 1:10 | ||||||||
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| Drive | 4WD | ||||||||
| Power Source | 2S-3S LiPo | ||||||||
| Length | 20.94in (532mm) | ||||||||
| Wheelbase | 12.28in (312mm) | ||||||||
| Width | 9.8in (249mm) | ||||||||
| Height | 10.47in (266mm) | ||||||||
| Weight | 102.65oz (2910g) | ||||||||
Electronics
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Wheels
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Tires
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| Assembly Level | Kit | ||||||||
*Tech Note: RC Kits are an unassembled Remote Control Model that require assembly, user selected electronics, and other racer provided items. Photos of assembled kit are for illustrative purposes only. For a complete list of needed items to drive this kit please see the list above.
Manuals:
User Manual
CA Residents Prop 65 Warning
WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Details...Reviews4.5 · 2 reviews
I built this several years ago. It is, to me a great deal. You get everything for the build. The only down side, is it does not come with a body.If you prefer to build, then this is for you for sure!
I did not buy this kit through Amain, I got it on sale at a local hobby store. However, this a great kit, relatively straight forward to assemble, and makes a great trail truck. The two speed transmission and locking diffs are more fun than I thought they would be. The chassis, axles, shocks, etc. are all heavy duty and bomb proof. The Canyon Trail Tires are actually good, especially if you snip them. The only things I would recommend are a different servo, esc, and some beadlock wheels. Get a $20 20kg servo, a Hobbywing 1080G ESC, and some Treal beadlock wheels (fantastic wheels for the price with decent weight). The Traxxas ESC is not horrible, in fact it is fine, but from what I have read it has an anemic 6 Volt output for the servo and you don't have a lot adjustability of parameters (i.e. drag brake setting, reverse force setting, etc.). The Traxxas radio and receiver are good to go, even if the Traxxas radio is large and clunky. I have owned many different rigs, and in my opinion the TRX4 builder kit, with the few mods I listed, is a great way to get one of the best trail rigs out there. You don't need to break the bank to get an awesome trail rig.