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    This product was added to our catalog on Wednesday 03 February, 2021.

    Losi Lasernut U4 2.2 Rock Racer 4wd RTR with SMART ESC, Blue

    Price:  $850.00


Losi Lasernut U4 2.2 Rock Racer 4wd RTR with SMART ESC, Blue


With full independent suspension packed into the renowned TEN platform the Losi Lasernut U4 1/10th scale 4WD Rock Racer RTR is formidable. Packed with advanced Spektrum Smart technology this RC Rock Racer is poised to become a favourite for those who race rough.


  • Acclaimed 4WD TEN platform
  • Spektrum 1900kv 4-Pole 550 motor and brushless 130A SMART ESC
  • 2.4GHz Spektrum DX3 transmitter with optional telemetry and AVC
  • Protected waterproof components
  • Shock caps and absorbers made from race inspired 12mm threaded aluminium
  • Sway bars are fully adjustable
  • Anodised 3mm aluminium chassis plate with upper deck of 4mm
  • 4mm 6061-T6 adjustable aluminium shock towers
  • Officially licensed components include – BF Goodrich M/T Tyres, Raceline 2.2 Wheels, and, Lasernut Race inspired body and cage
  • Three gear differentials that are oil filled
  • Independent suspension on front and rear
  • LED pod lights and light bar for night driving
  • Adjustable turnbuckles for increased adaptability and tuning
  • Increased handling and traction provided by adjustable differentials on the 4x4 driveline
  • Screws, nuts and bearings all part of a complete metric hardware set used throughout
  • Attach 4S LiPo (not included) to reach speeds of 80 km/h+
  • 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 aluminium 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 Smart 130A Brushless ESC and Spektrum 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 colour variations. Working together with BF Goodrich Tires, the Lasernut U4 has a scaled-down M/T tires that have an aggressive tread pattern that handles any terrain. The Losi Lasernut Rock Racer is the ultimate U4 racer with scale looks, insane speeds, performance and Spektrum Smart Technology.

    Legendary TEN Platform

    The legendary, high-performance TEN platform features a super-tough aluminium 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 Lasernut Race-Inspired Scale Body and Roll Cage

    A Lasernut Licensed race-inspired scale U4RC body/roll cage with exciting graphics offered in two different colour variations with a flip-up cage for easy access to the battery.

    Officially Licensed Wheels and Tyres

    The included scale licensed Raceline 2.2 racing wheels and BF Goodrich M/T tyres featuring an aggressive tread pattern that handles any terrain and good looks while out on any course.

    Waterproof Electronics

    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 aluminium threaded 12mm shocks are fully-adjustable and allow you to tune the handling of the Lasernut U4 to maximize performance and dominate anywhere.

    Aluminium Chassis

    The foundation of the Lasernut U4 consists of a 3mm, anodized aluminium 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.

    Adjustable Turnbuckles

    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 Aluminium 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 dialled 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, centre (aluminium) and rear differentials can also be tuned for various conditions.

    Metric Hardware

    Complete metric hardware is featured throughout the Lasernut U4, including bearings, screws and nuts.

    50+ MPH Spektrum Firma 4-Pole 1900kv 550 Motor

    The brushless 1900kv 550 Motor will provide excellent power (50+ MPH) with a 4 cell Lipo (not included).

    Spektrum™ DX3™ Radio System

    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.

    What's in the box?

    • (1) Lasernut U4 4WD Brushless RTR Vehicle with:

      • (1) Spektrum™ Firma 130A Brushless SMART ESC (installed)

      • (1) Spektrum™ 4-Pole 1900kv 550 Motor (installed)

      • (1) Spektrum™ SR6100AT Receiver with AVC (installed)

    • (1) Spektrum DX3™ 2.4GHz Radio Transmitter

    • (1) Product Manual

    What you need

    • 3S or 4S LiPo battery
    • Compatible charger
    • LiPo safety bag
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