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Losi 1/10 Lasernut U4 4WD Brushless RTR with Smart ESC, Blue (Losi 03028T1 | LOS03028T1)

Model: Losi 03028T1
Dist. #: LOS03028T1   SKU: LOS03028T1

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List Price:  $609.99
Price:  $539.99
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Updated on Oct 8, 2025 06:13:36 PM

1/10 Lasernut U4 4WD Brushless RTR with Smart ESC, Blue...


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Features

10 4WD Platform

Spektrum™ 130A Brushless SMART ESC and 4-Pole 1900kv 550 Motor

Spektrum DX3™ 2.4GHz radio system with AVC® and optional telemetry

Waterproof Components

12mm race motivated threaded aluminum bodied shock absorbers and shock caps

Officially-licensed Lasernut Racing Scale Body & Cage

Officially-licensed BFGoodrich® Mud-Terrain T/A® KM3 Tires

Officially-licensed Raceline 2.2 Wheels

Sway bars

3 Oil Filled Equipment Differentials





Overview
The 10 4WD platform is recognized all over the world as the personification of strength and sturdiness. The Losi® Lasernut U4 1/10-scale 4WD Rock Racer (RR) RTR with Spektrum™ Smart develops on the 10 design and adds items rock racers require such as aluminum shocks, sway bars and adjustable turnbuckles. Plus, it includes a complete metric hardware package for worldwide compatibility. The Lasernut is presently the only total Unlimited U4 FIS (Full Independent Suspension) racer on the marketplace featuring all the technological advances drivers require consisting of the Spektrum Smart 130A Brushless ESC and Spektrum 4-Pole 1900kv 550 motor providing higher efficiency enhancing run times with increased power. Of course, the ESC is waterproof, totally programmable and comes pre-wired with a high-current IC5™ connector. Drivers remain in control with a DX3™ transmitter, a Spektrum AVC® receiver with steering top priority, and an officially-licensed Lasernut race-inspired scale U4RC body/roll cage with two different graphics and color variations. Interacting with BFGoodrich Tires, the Lasernut U4 has scaled down KM3 tires that have an aggressive tread pattern efficient in handling any surface. The Losi Lasernut Rock Racer is the supreme U4 racer with scale looks, outrageous speeds and performance, and Spektrum Smart Technology.





Needed to Complete

3S or FOUR Hardcase LiPo Battery with IC5/EC5 Adapter

3S/4S Suitable LiPo Charger

Protective LiPo Storage/Charging Case

What remains 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) Item Handbook







 



Legendary 10 Platform

Legendary TEN Platform
The famous, high-performance 10 platform includes a super-tough aluminum chassis and the capability to change the Lasernut U4 independent suspension and drivetrain for any condition.
 

Spektrum SMART ESC

Spektrum SMART ESC
The ESC is waterproof, totally programmable and comes pre-wired with a high-current IC5 connector. The ESC will deal with a lot of sensorless brushless motors and is 3S-4S Li-Po suitable.
 





Officially Licensed Scale Body and Roll Cage

Officially Licensed Scale Body and Roll Cage

Officially Licensed Scale Body and Roll Cage
A Lasernut Licensed race motivated 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

Officially Licensed Wheels and Tires
The consisted of scale accredited Raceline 2.2 racing wheels and BFGoodrich KM3 tires include an aggressive tread pattern that manages any surface and good appearances while out on any course.
 

Waterproof Electronic devices

Waterproof Electronics
The Lasernut U4 is filled with waterproof electronics consisting of the receiver, servo and ESC. Everything is sealed versus the elements enabling you to splash in the rain, spin in the mud and make tracks in the snow. It's full-throttle liberty to run anytime, rain or shine
 





Coil-Over Oil Filled Shocks with Pre-Load Modification

Coil-Over Oil Filled Shocks with Pre-Load Adjustment
Adjustable oil filled coil-over shocks on all four corners take in the gnarliest surface. The aluminum threaded 12mm shocks are fully-adjustable and permit you to tune the handling of the Lasernut U4 to make the most of performance and dominate anywhere.
 

Aluminum Chassis

Aluminum Chassis
The structure of the Lasernut U4 includes a 3mm, anodized aluminum chassis plate with a 4mm upper deck. Whether you are hitting the rocks, getting huge air, or just large open, the 3mm chassis just keeps asking for more!
 





LED Light Bar and Pod Lights

LED Light Bar and Pod Lights
The fun does not stop even when the sun goes down with the Lasernut U4. A dazzling LED lights on the incorporated light bar cast sufficient illumination for performing at night. The pod lights are amber.
 

Adjustable Turnbuckles

Adjustable Turnbuckles
For included adjustability and tune-ability, adjustable turnbuckles come basic on the Lasernut U4.
 





Adjustable Sway Bars

Adjustable Sway Bars
The consisted of sway bars are totally adjustable and help you push the Lasernut U4 to its limits.
 

Adjustable Shock Towers

Adjustable Shock Towers
4mm 6061-T6 Aluminum shock towers are developed difficult to withstand the penalty the typeface end of the Lasernut U4 will receive
 





Independent Front and Rear Suspension

Independent Front and Rear Suspension
The front and rear suspension offer incredible managing with a constant feel and the capability to take in bumps. Everything amounts to a buggy that's called in for make the most of performance right out of the box.
 

4x4 Driveline with Adjustable Differentials

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.
 





Metric Hardware

Metric Hardware
Complete metric hardware is included throughout the Lasernut U4, consisting of bearings, screws and nuts.
 

50+ MPH Firma Motor

50+ MPH Firma Motor
The brushless Spektrum Firma 4-Pole 1900kv 550 Motor will offer outstanding power (50+ MPH) with a 4 cell Lipo (not consisted of).
 





Spektrum DX3 Radio System

Spektrum DX3 Radio System

Spektrum™ DX3™ Radio System
The Spektrum™ DX3™ radio system offers innovative functions like AVC control, a 3-position throttle limiting switch and travel change.





The Full-Throttle Freedom of AVC Innovation

The Full-Throttle Freedom of AVC Technology

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 changes per second, so more of the motor's power is translated into ballistic speed and acceleration rather of just flying dirt. The patent-pending AVC system adds a level of performance that simply cannot be discovered with any lorry from any manufacturer besides Horizon Hobby. Like traction control in your major lorry, you can activate or shut down the system on the fly and change the level of stability based upon driving conditions. Any RC lorry can go quick and with AVC you can go quicker while keeping maximum stability in all driving conditions.



Specifications

Approximate Assembly Time: No assembly needed

Batteries: 3S-4S LiPo, sold independently

Battery Dimensions: t

Body: Trimmed and painted

Brakes: Integral with ESC

Bushing Material: Metal

Chassis: 3mm, 6061 T-6 Aluminum

Conclusion Level: Ready-To-Run

Differential: Sealed thick filled gear type

Drivetrain: 4WD

Ground Clearance: 1.75 in (44.4mm)

Height: 8 in (203.2mm)

Internal Equipment Ratio: 3.89:1

Length: 24.3 in (617.2mm)

Motor Size: 550 4-pole, 1900Kv

Motor Type: Brushless, Non-sensored brushless

Pinion: 12T

Shock Type: Aluminum body oil-filled

Speed Control: Y

Suspension: Independent

Innovation : Smart Innovation

Tire Size: 5.75 in (146mm)

Tire Tread: BFG Mud Surface

Track: Front and Rear 13.25 in (336.5mm)

Weight: Varies with devices

Wheel Width: 1.63 in (41.4mm)

Wheelbase: 14.75 in (374.6mm)

Frequently Bought Together

Losi 1/10 Lasernut U4 4WD Brushless RTR with Smart ESC, Blue
+
Losi 1/10 Lasernut U4 4WD Brushless RTR with Smart ESC, Black
This Item: Losi 1/10 Lasernut U4 4WD Brushless RTR with Smart ESC, Blue
$539.99
Losi 1/10 Lasernut U4 4WD Brushless RTR with Smart ESC, Black
$539.99

Total Price: $1,079.98

Add Both To Cart

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