Lasernut U4 SMART ESC 1/10 4WD RTR

RC cars » Electric » Scale 1:10 » Crawler

Brand: Losi

Item number: LOS03028

Discontinued
Item cannot be ordered

Question to product

Parameters
Videos
Gallery
Support
Accessories

Parameters

Type	Rock Racer
Chassis	Kovové
Scale	1:10
Length	617 mm
Width	337 mm
Height	203 mm
Wheelbase	375 mm
Ground clearance	44 mm
Battery compartment	138.5 x 46.5 x 35mm
Weight	4082 g
Drive	4WD
Engine	Spektrum™ 4-Pole 1900kv 550
Front wheels	Raceline/BFGoodrich® Mud-Terrain rozm. 144x57mm
Rear wheels	Raceline/BFGoodrich® Mud-Terrain rozm. 144x57mm
Olej tlumičů	35 wt
Olej diferenciálů	10k/20k/5k cst (F/C/R)

Packaging informations
Dimensions	80,0 x 36,0 x 25,0 cm
Weight	6,574 kg

Videos

Video

Gallery

Technical support

Manuals

Manuál EN [7,97 MB]
Manuál DE [8,27 MB]
Manuál FR [8,38 MB]
Manuál IT [8,38 MB]

Product letters

Product sheet

Exploded views

Spare parts

Losi Body Clip Leash (4)

LOS230072

179,00 Kč

In stock 2 pcs
Can be available 11.5.2026

Losi Body Set, Blue, Painted: Lasernut U4

LOS230075

2 449,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Body Set, Red, Painted: Lasernut U4

LOS230076

2 449,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Body Set, Clear: Lasernut U4

LOS230077

2 449,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Cage Set: Lasernut U4

LOS230078

569,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi LED, Cage Parts: Lasernut U4

LOS230079

829,00 Kč

In stock 2 pcs
Can be available 11.5.2026

Losi Steering Bellcrank Set: Tenacity

LOS231026

289,00 Kč

In stock
Can be available 15.5.2026

Losi Steering Posts Tubes and Hardware: Lasernut U4, Tenacity

LOS231027

569,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Motor Mount: Lasernut U4, Tenacity

LOS231031

569,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Steering Drag Link and Hardware: Lasernut U4, Tenacity

LOS231033

319,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Rod Ends and Links: Tenacity Pro

LOS231057

829,00 Kč

In stock
Can be available 15.5.2026

Losi Side Guards: Lasernut U4

LOS231063

269,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Top Deck, Battery Mount: Lasernut U4

LOS231064

569,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Rear Ring and Pinion Gear Set: Lasernut U4, Tenacity

LOS232028

1 089,00 Kč

In stock
Can be available 15.5.2026

Losi Wheel Hex Set (4): Lasernut U4, Tenacity

LOS232031

319,00 Kč

Item is not in stock

Losi Front and Rear Driveshafts (2): Lasernut U4, Tenacity

LOS232032

1 089,00 Kč

In stock
Can be available 15.5.2026

Losi Center Dogbone Set: Lasernut U4

LOS232054

289,00 Kč

In stock
Can be available 15.5.2026

Losi Shock Plastics Set: Lasernut U4, Tenacity

LOS233011

569,00 Kč

In stock
Can be available 15.5.2026

Losi Rear Shock Shaft (2): Lasernut U4, Tenacity

LOS233014

289,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Front Shock Shaft (2): Tenacity

LOS233015

289,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Adjuster Nut: Lasernut U4, Tenacity Pro

LOS233025

209,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Aluminum Shock Caps: Lasernut U4, Tenacity Pro

LOS233026

289,00 Kč

In stock
Can be available 15.5.2026

Losi Front Arm Set: Lasernut U4, Tenacity

LOS234016

569,00 Kč

In stock
Can be available 15.5.2026

Losi Rear Arm Set: Lasernut U4, Tenacity

LOS234017

569,00 Kč

Item is not in stock

Losi Front Spindle and Carrier Set: Lasernut U4, Tenacity

LOS234018

569,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Rear Hub Set: Lasernut U4, Tenacity

LOS234020

289,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Pivot Pin Mount Set, Steel (4): Lasernut U4, Tenacity

LOS234023

289,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Aluminum Front Shock Tower: Lasernut U4, Tenacity Pro

LOS234035

319,00 Kč

In stock
Can be available 15.5.2026

Losi Rear Sway Bar Set: Lasernut U4

LOS234038

829,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Set Screws M3x3mm Cup Point(10)

LOS235011

209,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Set Screw M4x4mm Cup Point(10)

LOS235012

209,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Button Head Screws M3x25mm (10)

LOS235024

319,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Button Head Screws M3x30mm (10)

LOS235025

319,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Set Screws M3x4mm Cup Point(10)

LOS235026

289,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Set Screws M3x10mm Cup Point(10)

LOS235027

289,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi 1.0 Module Pitch Pinion, 12T

LOSA3572

289,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi 1.0 Module Pitch Pinion, 14T

LOSA3574

289,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi 6x12x3mm Sealed Ball Bearing (4)

LOSA6940

289,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Spektrum DX3 Smart DSMR, SR315

SPM2340

2 999,00 Kč

In stock 2 pcs
Can be available 11.5.2026

Spektrum S614 Metal Gear Servo 15kg.cm 23T WP

SPMS614

839,00 Kč

In stock
Can be available 15.5.2026

Spektrum Receiver SR6100AT DSMR 6CH AVC w/ Telemetry

SPMSR6100AT

2 999,00 Kč

In stock 2 pcs
Can be available 11.5.2026

Spektrum ESC Brushless Smart Firma 130A 2-4S

SPMXSE1130

4 349,00 Kč

In stock 4 pcs
Can be available 11.5.2026

Spektrum Brushless Motor Firma 3660 1900kV

SPMXSM2200

2 289,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Flat Head Screws, M2.5 x 10mm (10)

TLR235007

209,00 Kč

In stock
Can be available 15.5.2026

Button Head Screws, M4x16mm (10)

TLR255008

209,00 Kč

In stock
Can be available 15.5.2026

Nylock Nut, M4 (10)

TLR256005

209,00 Kč

In stock
Can be available 15.5.2026

M3 Flanged Aluminum Lock Nuts, Black (10)

TLR336005

289,00 Kč

Item is not in stock

Button Head Screws, M3 x 6mm (10)

TLR5901

209,00 Kč

In stock
Can be available 15.5.2026

Button Head Screws, M3 x 8mm (10)

TLR5902

209,00 Kč

In stock 10 pcs and more
Can be available 11.5.2026

Button Head Screws, M3 x 10mm (10)

TLR5903

209,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Button Head Screws, M3 x 12mm (10)

TLR5904

179,00 Kč

In stock 6 pcs
Can be available 11.5.2026

Button Head Screws, M3 x 16mm (10)

TLR5909

209,00 Kč

In stock
Can be available 15.5.2026

Button Head Screws, M3 x 14mm (10)

TLR5910

209,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Kopfschraube, M3 x 10mm (10)

TLR5932

209,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Kopfschraube, M3 x 12mm (10)

TLR5933

209,00 Kč

Item is not in stock

Flathead Screws, M3 x 12mm (10)

TLR5963

209,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Fltahead Screws, M3 x 16mm (10)

TLR5964

209,00 Kč

In stock
Can be available 15.5.2026

Flathead Screw, M3 x 20mm (10)

TLR5965

209,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Locknut, M3 x .5 x 5.5mm (10)

TLR6313

209,00 Kč

Item is not in stock

Washers, M3 (10)

TLR6352

209,00 Kč

In stock 1 pcs
Can be available 11.5.2026

TLR Silicone Shock Oil 420cSt (35Wt) 56ml

TLR74008

269,00 Kč

In stock 50 pcs and more
Can be available 11.5.2026

Optional accesories

Startup Tool Set: Metric

DYN2834

969,00 Kč

In stock 2 pcs
Can be available 11.5.2026

Losi Machined Aluminum Motor Mount: Tenacity

LOS331012

569,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Aluminum Rear Hubs (2): Tenacity

LOS334011

1 359,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Aluminum Front Spindle (2): Tenacity

LOS334012

1 089,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Aluminum Spindle Carrier (2): Tenacity

LOS334013

1 089,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Desert Claws Tires with Foam Soft (2):

LOS43011

829,00 Kč

Item is not in stock

Losi 1.0 Module Pitch Pinion, 13T

LOSA3573

289,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi 1.0 Module Pitch Pinion, 16T

LOSA3576

289,00 Kč

In stock
Can be available 15.5.2026

Losi 1.0 Module Pitch Pinion, 18T

LOSA3578

289,00 Kč

In stock
Can be available 15.5.2026

Losi Height Gauge

LOSA99173

569,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Losi Car Stand 1:10 and 1: 8

LOSA99174

569,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Spektrum S6230 Digital Surface Servo 22.4kg.cm 0.14s/60° 23T

SPMSS6230

2 719,00 Kč

Item is not in stock

4mm Aluminum Serrated Lock Nuts, Black (6)

TLR336000

289,00 Kč

In stock 1 pcs
Can be available 11.5.2026

4mm Aluminum Serrated Lock Nuts, Blue (6)

TLR336001

429,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Bleeder Shock Caps Aluminum (2): TEN

TLR5062

829,00 Kč

In stock
Can be available 15.5.2026

TLR Silicone Shock Oil 340cSt (30Wt) 56ml

TLR74006

269,00 Kč

In stock 50 pcs and more
Can be available 11.5.2026

TLR Silicone Shock Oil 520cSt (40Wt) 56ml

TLR74010

269,00 Kč

In stock 10 pcs and more
Can be available 11.5.2026

Losi Spring Set: Lasernut U4

LOS234042

289,00 Kč

In stock
Can be available 15.5.2026

Pro-Line 1/10 Mickey Thompson Baja Pro X F/R 2.8" Tires MTD 12mm/14mm Raid (2)

PRO1023710

1 569,00 Kč

In stock 2 pcs
Can be available 11.5.2026

Pro-Line Wheels 2.8", Badlands MX28 Tires, Raid H12 Black Wheels (2)

PRO1012510

1 439,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Batteries

Spektrum Smart LiPo 11.1V 5000mAh 30C HC IC5

SPMX50003S30H5

2 289,00 Kč

In stock 2 pcs
Can be available 11.5.2026

Spektrum Smart LiPo 11.1V 5000mAh 50C HC IC5

SPMX50003S50H5

2 319,00 Kč

In stock 3 pcs
Can be available 11.5.2026

Spektrum Smart LiPo 11.1V 5000mAh 100C HC IC5

SPMX50003S100H5

2 609,00 Kč

In stock 3 pcs
Can be available 11.5.2026

Spektrum Smart G2 LiPo 11.1V 5000mAh 30C HC IC5

SPMX53S30H5

2 159,00 Kč

In stock 2 pcs
Can be available 11.5.2026

Spektrum Smart G2 LiPo 11.1V 5000mAh 50C HC IC5

SPMX53S50H5

2 319,00 Kč

In stock 4 pcs
Can be available 11.5.2026

Smart Powerstage 5000mAh 3S LiPo- S155 Charger EU

SPMXPSS300I

3 719,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Spektrum Smart G2 LiPo 11.1V 5000mAh 100C HC IC5

SPMX53S100H5

2 519,00 Kč

In stock 2 pcs
Can be available 11.5.2026

Spektrum 11.1V 4000mAh 3S 30C Smart G2 Hardcase LiPo Battery: IC5

SPMX-1088

2 059,00 Kč

In stock 2 pcs
Can be available 11.5.2026

Spektrum Smart LiPo 14.8V 5000mAh 30C HC IC5

SPMX50004S30H5

2 899,00 Kč

In stock 2 pcs
Can be available 11.5.2026

Spektrum Smart LiPo 14.8V 5000mAh 50C HC IC5

SPMX50004S50H5

2 899,00 Kč

In stock 3 pcs
Can be available 11.5.2026

Spektrum Smart LiPo 14.8V 5000mAh 100C HC IC5

SPMX50004S100H5

3 189,00 Kč

In stock 4 pcs
Can be available 11.5.2026

Spektrum Smart G2 LiPo 14.8V 5000mAh 30C HC IC5

SPMX54S30H5

2 609,00 Kč

In stock
Can be available 15.5.2026

Spektrum Smart G2 LiPo 14.8V 5000mAh 50C HC IC5

SPMX54S50H5

2 899,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Spektrum Smart Powerstage LiPo 14.8V 5000mAh, Charger S155

SPMXPSS400I

4 219,00 Kč

In stock 2 pcs
Can be available 11.5.2026

Spektrum Smart G2 LiPo 14.8V 5000mAh 100C HC IC5

SPMX54S100H5

3 189,00 Kč

In production
Expected 30.6.2026

Accesories

S100 1x100W USB-C Smart Charger

SPMXC2090

839,00 Kč

In production
Expected 21.8.2026

Spektrum S100 1x100W USB-C Smart Charger, 65W USB-C GaN Power Supply Combo

SPMXC2090PI

1 359,00 Kč

Ordered

Spektrum Charger Smart S155 G2 1x55W AC

SPMXC2050I

2 059,00 Kč

In stock 1 pcs
Can be available 11.5.2026

S250 AC 2x50W Smart Charger

SPMXC2060I

3 709,00 Kč

In stock 5 pcs and more
Can be available 11.5.2026

Spektrum Charger Smart S1100 G2 1x100W AC

SPMXC2080I

3 429,00 Kč

In stock 5 pcs and more
Can be available 11.5.2026

Spektrum Charger Smart S1200 G2 1x200W AC

SPMXC2020I

4 219,00 Kč

In stock 4 pcs
Can be available 11.5.2026

Spektrum Charger Smart S2100 G2 2x100W AC

SPMXC2000I

5 549,00 Kč

In stock 4 pcs
Can be available 11.5.2026

Spektrum Charger Smart S2200 G2 2x200W AC

SPMXC2010I

7 209,00 Kč

In stock 5 pcs and more
Can be available 11.5.2026

Spektrum Charger Smart S1400 G2 1x400W AC

SPMXC2040I

5 819,00 Kč

In stock 4 pcs
Can be available 11.5.2026

Spektrum XBC200 Smart Tester

SPMXBC200

2 059,00 Kč

In stock 2 pcs
Can be available 11.5.2026

Spektrum IC3 Battery to IC5 Device with 4

SPMXCA507

279,00 Kč

In stock 2 pcs
Can be available 11.5.2026

Spektrum Adapter IC3 Battery - IC2 Device

SPMXCA320

249,00 Kč

In stock 2 pcs
Can be available 11.5.2026

TLR Silicone Shock Oil 250cSt (25Wt) 56ml

TLR74004

269,00 Kč

In stock 6 pcs
Can be available 11.5.2026

TLR Silicone Shock Oil 380cSt (32.5Wt) 56ml

TLR74007

269,00 Kč

In stock 10 pcs and more
Can be available 11.5.2026

TLR Silicone Shock Oil 470cSt (37.5Wt) 56ml

TLR74009

269,00 Kč

In stock 10 pcs and more
Can be available 11.5.2026

TLR Silicone Diff Oil 10000cSt 30ml

TLR5282

289,00 Kč

In stock
Can be available 15.5.2026

TLR Silicone Diff Oil 30000cSt 30ml

TLR5285

289,00 Kč

Item is not in stock

Robitronic Tire Glue for Tires 20ml

RL300

189,00 Kč

In stock 2 pcs
Can be available 11.5.2026

H-Speed Magic car clean 500ml

HSPM002

289,00 Kč

On the way 6 pcs
Expected 11.5.2026

H-Speed screwdriver hex 1.5mm

HSPZ301

159,00 Kč

In stock 2 pcs
Can be available 11.5.2026

H-Speed screwdriver hex 2.0mm

HSPZ302

159,00 Kč

On the way 7 pcs
Expected 11.5.2026

H-Speed screwdriver hex 2.5mm

HSPZ303

159,00 Kč

On the way 10 pcs and more
Expected 11.5.2026

H-Speed screwdriver hex 3.0mm

HSPZ304

159,00 Kč

In stock 2 pcs
Can be available 11.5.2026

H-Speed screwdriver hex with ball 2.0mm

HSPZ311

159,00 Kč

In stock 3 pcs
Can be available 11.5.2026

H-Speed hex driver 2.5mm ball-end

HSPZ312

159,00 Kč

In stock 1 pcs
Can be available 11.5.2026

H-Speed screwdriver hex with ball 3.0mm

HSPZ313

159,00 Kč

In stock 3 pcs
Can be available 11.5.2026

H-Speed LiPo Safe Bag 185x75x6mm

HSP0011

279,00 Kč

In stock 10 pcs and more
Can be available 11.5.2026

H-Speed LiPo Safe Bag 210x160x150mm

HSP0010

379,00 Kč

In stock 2 pcs
Can be available 11.5.2026

H-Speed Stepped bearing drift 2-14mm

HSPZ314

289,00 Kč

In stock 3 pcs
Can be available 11.5.2026

H-Speed nut driver 4.0mm

HSPZ305

159,00 Kč

In stock 6 pcs
Can be available 11.5.2026

H-Speed nut driver 4.5mm

HSPZ306

159,00 Kč

In stock 3 pcs
Can be available 11.5.2026

H-Speed nut driver 5.0mm

HSPZ307

159,00 Kč

Item is not in stock

H-Speed nut driver 5.5mm

HSPZ308

159,00 Kč

In stock 4 pcs
Can be available 11.5.2026

H-Speed nut driver 7.0mm

HSPZ309

159,00 Kč

In stock 5 pcs
Can be available 11.5.2026

H-Speed nut driver 8.0mm

HSPZ310

159,00 Kč

In stock 2 pcs
Can be available 11.5.2026

H-Speed hook-and-loop strap 18mm (1m)

HSPZ004

119,00 Kč

On the way 3 pcs
Expected 11.5.2026

H-Speed wrench 3/4/5/5.5/7/8mm

HSPZ006

179,00 Kč

In stock 3 pcs
Can be available 11.5.2026

H-Speed camber gauge

HSPZ008

799,00 Kč

In stock 2 pcs
Can be available 11.5.2026

H-Speed aluminum parts tray

HSPZ009

729,00 Kč

In stock 2 pcs
Can be available 11.5.2026

H-Speed ride height gauge 3–42mm

HSPZ014

349,00 Kč

On the way 2 pcs
Expected 11.5.2026

H-Speed nut driver 5.5mm short

HSPZ010

279,00 Kč

In stock 2 pcs
Can be available 11.5.2026

Pro-Line PRO Car Stand with Multi-Use 1/28-1/8 Scale Toppers

PRO644900

999,00 Kč

In stock 1 pcs
Can be available 11.5.2026

Grime 2 Shine

DM-AC27

Grime to Shine from Deluxe materials is foaming cleaner that will remove effortlessly unsightly dirt & oily grime on models, pit boxes, tools etc. Volume 225 ml.

289,00 Kč

In stock 3 pcs
Can be available 11.5.2026

Spektrum GNSS Wireless GPS Speed Meter & Data Logger

SPMXGPS100

2 899,00 Kč

In stock 3 pcs
Can be available 11.5.2026

Double-sided adhesive foam pad 15x20x1mm (10)

A9393

49,00 Kč

In stock 72 pcs
Can be available 11.5.2026

Nylon cable tie 1x2x110mm (10)

A9392

10,00 Kč

In stock 4 pcs
Can be available 11.5.2026

Nylon cable tie 1x2x75mm (10)

A9391

10,00 Kč

In stock 77 pcs
Can be available 11.5.2026

Hex driver key 1.5mm (5)

A9390

10,00 Kč

In stock 13 pcs
Can be available 11.5.2026

Reamer up to 14mm

NA3417A

699,00 Kč

In stock 7 pcs
Can be available 11.5.2026

More than 80 000 items in stock
Fast delivery when ordering before 14:00
Free personal collection at the store
Official distributor
Consulting and service

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