MEET THE MONSTER KING!

The legend has evolved, and it’s bigger, tougher, and meaner than ever! The HPI Racing Monster King is here to take the crown, born from the DNA of two fan-favorite platforms: the Wheely King and the Crawler King. By combining the best of the Wheely-King and Crawler King into a single monster truck platform, we’ve created something special for Wheely-King fans!

Built around a refined version of the original Wheely King chassis, the Monster King boasts a new center gearbox with external slipper clutch, enhanced steering geometry, and new hex hardware for easier maintenance. Every change made  with the performance, and fun in mind — from the Lock-Nut suspension mounts that banish E-clips forever, to the rugged new Tredz tires wrapped around wide 2.2” MT wheels.

Topping it all off is the fully licensed Ford Bronco 4400 bodyshell, an RC replica inspired by the real-life Big Kahuna truck, run by Shane England, with the help of RTR Vehicles and Vaughn Gittin Jr. Motorsports. Featuring a detailed interior, internal roll cage, and working LED light bars, this stunning body brings authentic Big Kahuna style and realism to the Monster King.

The Monster King Big Kahuna brings the spirit of the original Wheely King into a new era. Stronger, smoother, and packed with upgrades that fans will appreciate. With its tough solid-axle design, authentic details, and that unmistakable HPI fun factor, it’s ready to tear up any terrain in true monster truck style.

Features

• 1/10th Scale Monster Truck
• Fully licenced RTR-Vehicles Ford Bronco 4400 Polycarbonate bodyshell
  with hard plastic cage and driver.
• Updates to the Wheely King/Crawler King chassis
• New centre gearbox configuration
• New external adjustable slipper clutch
• New spur gear cover
• New motor mount plate
• Motor mounting positioning Inserts
• New rear body mount bracing
• New radio box
• New “E-Clip” eliminating lower shock and linkage mounts
• New steering linkage
• New Hex hardware
• New 2.2” 56mm wide MT wheels and Tredz 135x86mm “TRZ” tires.
• Oil-Filled shocks
• Front and rear differentials
• Aluminum blue-anodized lower links
• Higher Carbon content, less flexible upper links
• TF-51 Transmitter and RF-51 Receiver
• SC-3SWP2 Brushed ESC (2S Max recommended for Brushed Motor)
• Brushed 550 12T motor
• LED headlights and roof bar lights included (TX controlled)
• 2000mAh Ni-MH pack and USB Charger included
• Metal Geared Steering Servo (6.0V/16kg/MG)

Tredz TRZ 135x86mm tires

No monster truck is complete without a serious set of shoes, and the Monster King Big Kahuna delivers in style. Brand-new 2.2” 56mm wide monster truck wheels give the truck a bold, aggressive stance, perfectly matched to the new Tredz TRZ 135x86mm tires. Designed specifically for the Monster King, these high-grip TRZ tires feature a deep, open tread pattern that provides outstanding traction on dirt, grass, gravel, and asphalt alike. Whether you’re pulling wheelies, climbing rocks, or carving up the backyard, these tyres are built to perform.

Moulded in HPI’s high-quality rubber compound, the new Tredz TRZ tyres strike the perfect balance between soft, grippy feel and long-lasting durability. Combined with the wide wheels for improved stability, they deliver confident handling and predictable control across any terrain — all while giving the Monster King its unmistakable, beefed-up monster truck look.

Fully Licensed Bodyshell & Authentic Graphics

The Big Kahuna name has serious pedigree — and your new HPI Racing Monster King Big Kahuna model brings that legacy straight into your hands. Driven and owned by Shane England out of Powderly, Texas, Big Kahuna made its debut in 2013 and has become a fan-favourite for its daring stunts, bold graphics and surf-culture flair. 

We’ve captured that spirit in a meticulously licensed bodyshell: the Ford Bronco 4400–inspired design that Big Kahuna unveiled for its modern era. Every curve, graphic and detail reflects the real truck’s aesthetic, from the surf-board silhouette to the rugged roll-cage and standout “BIG KAHUNA” brand.

Crafted from high-strength polycarbonate, the bodyshell is screenprinted and hand-finished with cutout windows sitting atop a hard-plastic internal roll cage for scale authenticity and durability. You’ll also see working LED lights in the grille and roof-bar, controlled via the transmitter for show-quality lighting on scene.

It’s a full-fidelity tribute to the real Big Kahuna truck, now shrunk to RC scale with all the attitude intact.

ALL-NEW RADIO GEAR

The Monster King is easy to drive with the included All-New 4 Channel 2.4Ghz FHSS TF-51 Transmitter. Features:

• NEW - 4th Channel - 100 position digital slider,
• NEW - Steering Exponential, 
• Drop-down steering position for a natural control position,
• Foam-covered wheel for extra comfort and grip,
• Swappable steering wheel design for left-handers!
• Rubber finger and thumb handle grips,
• Rubber bumpers on all corners for the highest protection,
• Magnetic area for body clips or screws while you work!
• Digital on and off switch,
• Audible warnings for low power and idle time!
• Servo Reverse, EPA, Trims and Dual Rate switches.

The NEW RF-51 receiver features a waterproof silicone inner jacket for use in any weather and a built-in failsafe - Uses the HPI 4-way LED Adaptor to add headlights with the built-in LED Light controller!

Authentic Straight-Axle Design

Just like classic Monster Trucks, the Monster King is fitted with real straight axles front and rear, which lets you put the power down when you need to. Most importantly, they let each of the tires contact the ground at exactly 90 degrees for the largest contact patch and maximum grip and traction!

Real Monster Truck Suspension Design

One of the standout features of the Monster King Big Kahuna is its authentic suspension and drivetrain layout, inspired by real full-size off-road monster trucks. The proven 3-link suspension design combines two aluminum lower links with a single Y-shaped upper link made from a new, higher-carbon compound material for increased stiffness and durability.

Stronger Steering Power

Taking control to the next level, the Monster King Big Kahuna now comes equipped with the all-new HPI SD-16MGWP Metal-Geared Waterproof Steering Servo. Delivering a massive 16kg of torque at 6.0V, this upgrade more than doubles the strength of the previous plastic-geared 6kg servo, giving you precise, confident steering no matter how rough the terrain gets.

SD-16MGWP STEERING SERVO

Built with full metal gears and waterproof protection, the SD-16MGWP shrugs off dirt, mud, and water with ease, perfect for the all-terrain punishment the Monster King was made for. Whether you’re carving turns, powering through obstacles, or crushing cars, you’ll feel the difference in responsiveness and control from the very first drive.

NEW REAR BODY MOUNT BRACING

The Monster King Big Kahuna features new rear body mount bracing for improved durability and body support. This reinforced design keeps your body shell secure through hard landings, wild wheelies, and all-out monster action, built tough to handle whatever you throw at it.

More Torque, More Fun

Powering the Monster King Big Kahuna is a new FIREBOLT 550-size 12-turn brushed motor, delivering the perfect balance of torque and power, and reliable performance. With the extra punch over the previous setup, it gives you the muscle to conquer climbs, crush obstacles, and blast across any terrain with true monster truck attitude.