Losi 1/10 Lasernut U4 4WD SMART ESC RTR Blue


 First run Sold out pre-order for second run. 

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 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 color variations. Working together with BFGoodrich Tires, the Lasernut U4 has a scaled down KM3 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.

  • TEN 4WD Platform
  • Spektrum™ 130A Brushless SMART ESC and 4-Pole Firma 1900kv 550 Motor
  • Spektrum DX3™ 2.4GHz radio system with AVC® and optional telemetry
  • Waterproof Components
  • Sway bars
  • 12mm race inspired threaded aluminum bodied shock absorbers and shock caps
  • Officially-licensed Lasernut Racing Scale Body & Cage
  • Officially-licensed BFGoodrich KM3 Tires
  • Officially-licensed Raceline 2.2 Wheels
  • Three Oil Filled Gear Differentials


Chassis: 0.12 in (3mm) 6061 T-6 aluminum
Drive: Four wheel
Radio: Spektrum DX3
Brushless Motor: Non-sensored 550 4-pole 1900Kv
Shocks: Aluminum body oil-filled
Suspension: Independent
Tires: BFGoodrich KM3

 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
  • (1) Spektrum DX3 2.4GHz Radio Transitter
  • (1) Product Manual

Needed to Complete

  • 3S or 4S Hardcase LiPo Battery with IC5/EC5 Connector
  • 3S/4S Compatible LiPo Charger
  • Protective LiPo Storage/Charging Case


Length: 24.3 in (617.2mm)
Width: 13.25 in (336.5mm)
Height: 8 in (203.2mm)
Wheelbase: 14.75 in (374mm)
Ground Clearance: 1.75 in (44.4mm)
Front and Rear Track: 13.25 in (336.5mm) distance from outer edges
of wheels measured side-to-side
Weight: Varies with equipment used
Scale: 1:10
Wheel Diameter: 2.2 x 3.0 in
Wheel Width: 1.63 in (41.4mm)
Tire Diameter: 5.75 in (146mm)
Pinion Gear:12T
Spur Gear: 40T
Gear Pitch: MOD1
Internal Gear Ratio: 3.89:1
Final Drive Ratio: 12.97:1

More Information
Part # LOS03028T1
Brand Losi
Power Plant Electric
Terrain Type Off-Road
Vehicle Type Buggy
Drive Train 4WD
Scale 1/10