1/10 4WD RTR Lasernut U4 Black, Smart ESC
$539.99
Skip to product information
1/10 4WD RTR Lasernut U4 Black, Smart ESC
$539.99
1/10 Scale
Unlimited U4 Racer
Ready-To-Run
Fully Factory Assembled
Brushless Power
Spektrum 1900Kv Motor
4S LiPo Ready
Insane Off-Road Speeds
Spektrum AVC
Active Vehicle Control
TEN Platform
Proven 4WD Durability
In Stock
Conquer Any TerrainThe Ultimate Unlimited U4 Rock Racer
The Losi 1/10 Lasernut U4 4WD Brushless RTR brings full-scale rock racing intensity straight to your favorite terrain. Built on the world-renowned TEN 4WD platform, this high-performance RC Rock Racer delivers unmatched durability and scale realism out of the box.
Dominate The Off-RoadHigh-Performance Engineering Meets Scale Detail
Engineered to conquer extreme off-road environments, the Losi 1/10 Lasernut U4 4WD Brushless RTR features a rugged aluminum chassis loaded with race-inspired 12mm threaded aluminum shocks, front and rear sway bars, and three oil-filled gear differentials. Power is delivered through a high-efficiency Spektrum Firma 130A Brushless Smart ESC and a Firma 4-Pole 1900Kv 550 motor capable of handling up to 4S LiPo batteries for staggering top speeds. Equipped with officially-licensed BFGoodrich Mud-Terrain KM3 tires mounted on 2.2 Raceline wheels, along with built-in Spektrum AVC (Active Vehicle Control) technology, this rock racer offers laser-precise handling whether you are technical rock crawling or blasting through high-speed dirt courses.
Technical SpecificationsPrecision Engineering Under The Hood
Completion Level
Ready-To-Run
Drivetrain
4WD
Motor Size
Firma 4-Pole 1900Kv 550 Motor
Power Type
Electric
Differential
Three Oil Filled Gear Differentials
Vehicle Type
Rock Racer
Scale
1/10 Scale
Speed Control
Spektrum Firma 130A Brushless Smart ESC
Radio
Spektrum DX3 2.4GHz Transmitter
Receiver
Spektrum SR6100AT Receiver with AVC
Shock Type
12mm Threaded Aluminum Oil-Filled
Connector Type
IC5 / EC5 Compatible
Recommended Battery
3S or 4S Hardcase LiPo Battery
Chassis
TEN 4WD Platform
Tire Tread
BFGoodrich Mud-Terrain T/A KM3
Key Platform FeaturesBuilt To Conquer Every Obstacle
TEN 4WD ChassisProven worldwide for legendary strength and high durability
Spektrum Smart ElectronicsFirma 130A Smart ESC paired with 1900Kv brushless motor
Spektrum AVC TechnologyActive Vehicle Control keeps you in total control at top speed
Scale Licensed BodyRace-inspired Lasernut U4 scale body and full roll cage
BFGoodrich KM3 TiresAggressive tread pattern for maximum off-road traction
Race-Inspired Suspension12mm threaded aluminum shocks and sway bars
Waterproof ComponentsFully sealed electronics for bashing in wet conditions
Frequently Asked QuestionsEverything you need to know
What battery and charger do I need for the Losi 1/10 Lasernut U4 4WD Brushless RTR?
The Losi 1/10 Lasernut U4 4WD Brushless RTR requires a 3S or 4S hardcase LiPo battery equipped with an IC5 or EC5 connector, along with a compatible LiPo balance charger.
Is the Losi 1/10 Lasernut U4 4WD Brushless RTR suitable for beginners?
While the Losi 1/10 Lasernut U4 4WD Brushless RTR includes Spektrum AVC (Active Vehicle Control) to help maintain steering stability, its fast 4S brushless capabilities make it ideal for intermediate to advanced RC enthusiasts.
Is the Losi 1/10 Lasernut U4 4WD Brushless RTR waterproof?
Yes, the Losi 1/10 Lasernut U4 4WD Brushless RTR features waterproof electronics, allowing you to run through mud, wet grass, and light puddles without damaging your components.
What scale wheels and tires come stock on the Losi 1/10 Lasernut U4?
The Losi 1/10 Lasernut U4 4WD Brushless RTR features officially-licensed 2.2 Raceline wheels paired with high-traction BFGoodrich Mud-Terrain T/A KM3 tires.