The TEN 4WD platform is recognized all over the world as the personification of strength and durability. The Losi®Lasernut U4 1/10-scale 4WD Rock Racer (RR) RTR with Spektrum™Smart builds on the TEN design and adds items rock racers demand such as aluminum shocks, sway bars and adjustable turnbuckles. Plus, it includes a full metric hardware package for worldwide compatibility. The Lasernut is currently the only complete Unlimited U4 FIS (Full Independent Suspension) racer on the market featuring all the technological advances drivers demand including the Spektrum Firma Smart 130A Brushless ESC and Spektrum Firma 4-Pole 1900kv 550 motor providing greater efficiency improving run times with increased power. Of course, the ESC is waterproof, completely programmable and comes pre-wired with a high-current IC5™connector. Drivers stay in control with a DX3™transmitter, a Spektrum AVC®receiver with steering priority, and an officially-licensed Lasernut race-inspired scale U4RC body/roll cage with two different graphics and color variations. Working together with BFGoodrich Tires, the Lasernut U4 has scaled down KM3 tires that have an aggressive tread pattern capable of handling any terrain. The Losi Lasernut Rock Racer is the ultimate U4 racer with scale looks, insane speeds and performance, and Spektrum Smart Technology.
Legendary TEN Platform
The legendary, high-performance TEN platform features a super-tough aluminum chassis and the ability to adjust the Lasernut U4 independent suspension and drivetrain for any condition.
Spektrum Smart ESC
The ESC is waterproof, completely programmable and comes pre-wired with a high-current IC5 connector. The ESC will work with most sensorless brushless motors and is 3S-4S Li-Po compatible.
Officially Licensed Scale Body and Roll Cage
A Lasernut Licensed race inspired scale U4RC body/roll cage with exciting graphics offered in two different color variations with a flip up cage for easy access to the battery.
Officially Licensed Wheels and Tires
The included scale licensed Raceline 2.2 racing wheels and BFGoodrich KM3 tires featuring an aggressive tread pattern that handles any terrain and good looks while out on any course.
The Lasernut U4 is loaded with waterproof electronics including the receiver, servo and ESC. Everything is sealed against the elements allowing you to splash in the rain, spin in the mud and make tracks in the snow. It's full-throttle freedom to run anytime, rain or shine
Coil-Over Oil Filled Shocks with Pre-Load Adjustment
Adjustable oil filled coil-over shocks on all four corners soak up the gnarliest terrain. The aluminum threaded 12mm shocks are fully-adjustable and allow you to tune the handling of the Lasernut U4 to maximize performance and dominate anywhere.
The foundation of the Lasernut U4 consists of a 3mm, anodized aluminum chassis plate with a 4mm upper deck. Whether you are hitting the rocks, getting huge air, or just wide open, the 3mm chassis just keeps asking for more!
LED Light Bar and Pod Lights
The fun doesn't stop even when the sun goes down with the Lasernut U4. A brilliant LED lights on the integrated light bar cast more than enough illumination for running at night. The pod lights are amber.
For added adjustability and tune-ability, adjustable turnbuckles come standard on the Lasernut U4.
Adjustable Sway Bars
The included sway bars are fully adjustable and help you push the Lasernut U4 to its limits.
Adjustable Shock Towers
4mm 6061-T6 Aluminum shock towers are built tough to withstand the punishment the font end of the Lasernut U4 will receive
Independent Front and Rear Suspension
The front and rear suspension provide amazing handling with a consistent feel and the ability to soak up bumps. It all adds up to a buggy that's dialed in for maximize performance right out of the box.
4x4 Driveline with Adjustable Differentials
Full-time four-wheel drive provides increased traction and handling. The front, center (aluminum) and rear differentials can also be tuned for various conditions.
Complete metric hardware is featured throughout the Lasernut U4, including bearings, screws and nuts.
50+ MPH Firma Motor
The brushless Spektrum Firma 4-Pole 1900kv 550 Motor will provide excellent power (50+ MPH) with a 4 cell Lipo (not included).
The Spektrum™DX3™radio system offers advanced features like AVC control, a 3-position throttle limiting switch and travel adjust.
The Full-Throttle Freedom of AVC®Technology
The receiver's built-in AVC®(Active Vehicle Control®) traction control system works behind the scenes, making hundreds of throttle and steering adjustments per second, so more of the motor's power is translated into ballistic speed and acceleration instead of just flying dirt. The patent-pending AVC system adds a level of performance that simply cannot be found with any vehicle from any manufacturer other than Horizon Hobby. Like traction control in your full-scale vehicle, you can activate or deactivate the system on the fly and adjust the level of stability based on driving conditions. Any RC vehicle can go fast and with AVC you can go faster while maintaining optimum stability in all driving conditions.
Approximate Assembly Time
No assembly required
Trimmed and painted
Integral with ESC
0.12" (3mm) thick 6061 T-6 aluminum
Sealed viscous filled
Final Drive Ratio
Internal Gear Ratio
Max Battery Dimensions
5.45 x 1.83 x 1.38" (138.5 x 46.5 x 35mm)
8" (203 mm)
24.3" (617 mm)
Varies with equipment
13.25" (337 mm)
Oil-filled aluminum body
7-Day Shipping Anywhere in the World!
Our products covered with full manufacturer's warranty.
Most un-opened un-used products can be returned within 30 days by contacting us.
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