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.

Features:
Body sold separately:
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)
Titan 550 Motor:
Powerful Titan™ 21T reverse rotation motor with internal cooling fan
Precision, preset gear mesh adjustments
Motor retention separate from gear mesh
Portal Axles:
Increase ground clearance
Eliminate torque twist
Steel gears
Improve axle geometry and reduce strain on driveshafts
Transmission:
Two speed high/low range with remote shifting
Dual horizontal shafts
Twin friction plate slipper clutch
Easily removed for servicing
TQi™ 2.4GHz Radio System:
TQi 4-channel transmitter
5-channel micro receiver (#6533) with fail-safe security and integrated telemetry ports
Compatible with optional TQi Traxxas Link Wireless Module (#6511) to access full Traxxas Link app functionality (sold separately)
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
Patented waterproof receiver box with easy-access plug
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 for SWB and LWB configurations
Bumpers adjust fore and aft
Rugged rock rails adjust for width
Wire routing clips integrated into frame rails
Innovative Battery Compartment:
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 front battery tray accepts smaller 1/16 scale batteries (with optional strap)
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
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
Heavy-duty rod ends with steel hollow balls
5 mm diameter steel link rods with 4mm 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
Sealed Ball Bearings
Hex hardware with rust-resistant black oxide coating
Requires Battery and Charger (Sold Separately)

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

Needed to Complete:
TRX-4 Compatible Body (313mm Wheelbase)
(4) AA Batteries
6 or7 Cell NiMH or 2s or 3s Lipo Battery Pack with Traxxas Connector
Battery Charger with Traxxas Connector
Metric Hex Drivers (1.5mm,2.0mm,2.5mm)
Basic hand tools screwdrivers, needle nose pliers
CA Glue
Safety glasses