The Traxxas TRX-4 Scale and Trail™ Crawler set the standard for off-road versatility with its radical design and rugged durability. The new 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.
The TRX-4 Chassis Kit isn’t just for expert hobbyists. Traxxas goes the extra mile to make the full-color instruction book 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. Helpful assembly tips and clear illustrations take the frustration out of the assembly process. Have fun on the workbench and on the trail with the new TRX-4 Chassis Kit.
The TRX-4 Chassis Kit arrives ready to assemble with a full-color instruction guide, TQi 4-channel 2.4GHz 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. Choose your own body, battery, and charger (sold separately) to complete your custom ride. A staff of skilled representatives is on hand to answer your questions via phone, website, or e-mail. Unmatched parts support keeps your Traxxas vehicle running strong with parts and support from thousands of hobby dealers worldwide. Traxxas goes the extra mile to ensure that your RC experience is easy and fun.
Features:
- 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 (7.2–8.4V) and 2–3S LiPo (7.4–11.1V)
- 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
- Portal Axles
- Increase ground clearance (3.14”)
- Eliminate torque twist
- Steel gears
- Improve axle geometry and reduce strain on driveshafts
- 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
- 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
- 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
- Pre-assembled heavy-duty rod ends with steel hollow balls
- 5 mm diameter steel link rods with 4 mm threaded ends
- 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
- 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™ 2.4GHz 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 13ms 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
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) |
| Front Shock Length: | 3.54 inches (90 mm) |
| Rear Shock Length: | 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 |
| Motor (electric): | Titan® 21T reverse rotation |
| Differential Type: | 4 gear, remote locking |
| Transmission: | 2-speed Hi-Lo, 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: | 158.75 mm L x 47 mm W x 23/26 mm H |
Includes:
- Unassembled TRX-4 Chassis Kit
- TQi™ 2.4GHz 4-channel radio system with 4 servos
- XL-5 HV waterproof ESC
- Titan® 21T 550 motor
- Full-color step-by-step assembly manual
Required to Complete:
- TRX-4 compatible body (312 mm)
- 4 AA alkaline batteries
- Battery with Traxxas High-Current Connector
- 6 or 7 cell NiMH battery pack
- 2s or 3s LiPo battery pack
- Battery charger
- Metric hex drivers
- 1.5 mm, 2.0 mm, 2.5 mm
- Basic hand tools
- screwdrivers, needle nose pliers
- Traxxas Ultra-Premium Tire Glue (part #6468) or CA glue
- Safety glasses