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1/10 Hammer Rey U4 4WD Rock Racer Brushless RTR w/Smart Red
Losi Losi 0605482130421
SRP: £649.99

Product Details

Bred for off-road excellence, the Losi® Hammer Rey® is a SMART, RTR Rock Racer with AVC®. It's ideal for victory-minded enthusiasts looking for a superior RC experience with the inclusion of AVC, Spektrum Smart, and incredible scale details.

Key Features

  • Realistic details: 1 to 1 scale looks and performance
  • Powerful: Spektrum 3150kv brushless power system
  • Unparalleled Technology: SMART and AVC®
In The Box
  • (1) 1/10 Hammer Rey U4 4WD Rock Racer
  • (1) Spektrum DX3 Radio System
  • (1) Spektrum Firma® 130 Amp Brushless Smart ESC (installed)
  • (1) Spektrum Firma 4-Pole 3150Kv Brushless Motor (installed)
  • (1) Spektrum S614S Metal Gear Servo (installed)
  • (1) SR6200A DSMR 6-Channel AVC Surface Receiver (installed)
  • (1) Product Instruction Manual
  • (4) AA Batteries
Needed to Complete
  • (1) 2-3S LiPo Battery with EC5 or IC5 connector
  • (1) Compatible Battery Charger


  • Officially Licensed Casey Currie's U4 Racer
  • Officially Licensed KMC Machete wheels and Nitto Trail Grappler M/T tyres
  • Spektrum SMART 130A ESC 3150Kv Brushless Power System
  • Spektrum DX3 Radio System
  • Updated Steering System
  • Updated Rear Axle Housing
  • Independent Front Suspension with a Solid Rear Axle
  • Waterproof Electronics
  • Preset Motorplate
  • LED Light Bars and Headlights
  • Coil-over Oil-Filled Shocks
  • Spektrum S614S Metal Gear Servo
  • Sealed Metal-Gear Transmission and Diffs
  • Rear-Loading Battery
  • Longer Wheelbase
  • Spektrum AVC® technology


The Losi® Hammer Rey® is a SMART, Ready-to-Run Rock Racer with AVC®. It is officially licensed and based off Casey Currie's U4 Racer. It's powered with a Spektrum 3150Kv brushless motor and managed by the Smart 130A ESC, 6-channel DSMR AVC/telemetry receiver, and the new DX3 transmitter that provides Spektrum Smart feedback including live battery voltage. Along with the officially licensed design, the Hammer Rey includes KMC wheels, Nitto tyres, and additional details such as new shock reservoirs, fire extinguishers, and new light bars. It comes equipped with a solid rear axle, independent front suspension, and oil-filled shocks, so you can tear across all types of rocky off-road terrain. And you'll do so with the full-throttle freedom that only AVC® technology can provide. The Hammer Rey is ideal for victory-minded off-road enthusiasts looking for the top-of-the-line RC experience with the inclusion of AVC and the three-position limiting switch. With the Hammer Rey, Losi continues to push the limits when it comes to scale details, performance and officially licensed products.

Officially Licensed U4 Racer
Officially Licensed U4 Racer

Officially licensed and based off Casey Currie's U4 Racer. It features authentic scale details to the Hammer Rey. These will have racers doing double takes as they take on all corners.


Officially Licensed Wheels and Tyres
Officially Licensed Wheels and Tyres

The Hammer Rey has the look and feel of its real-world counterparts in ways you never imagined with KMC Machete wheels and Nitto Trail Grappler M/T tyres.


Spektrum<sup>™</sup> SMART 3150Kv Brushless Power System
Spektrum SMART 3150Kv Brushless Power System

The Hamer Rey comes equipped with a Spektrum 3150Kv Brushless motor, a Spektrum Smart 130A Brushless ESC, and a Spektrum SR6200A DSMR 6-Channel AVC/telemetry receiver providing Spektrum Smart feedback including live battery voltage. This potent combination can handle up to 3S LiPo batteries (sold separately) and will allow you to hurtle across the landscape at speeds of up to 40 mph.


Spektrum<sup>™</sup> DX3<sup>™</sup> Radio System
Spektrum DX3 Radio System

The Spektrum DX3 radio system offers advanced features like AVC® technology, a 3-position throttle limiting switch, and travel adjust.


Scale Details
Scale Details

Secondary shock with faux cooling reservoirs, fire extinguishers, Magnaflow exhaust system, upper LED light bar, lower LED light bar, LED headlights, fuel cell, faux sway bar, brake calipers/rotors, side mirrors, and more.


Updated Steering System
Updated Steering System

The steering servo mount and steering bell cranks have been re-designed for added durability.


Updated Rear Axle Housing
Updated Rear Axle Housing

The Hammer Rey rear suspension allows it to soak up massive whoops and bumps with the same realistic handling and movement of a full-scale U4 off-road racer. The rear axle housing includes an updated third member that uses larger diameter pinion bearings as well as an updated upper rear link mount for added durability.


Independent Front Suspension
Independent Front Suspension

The front, independent suspension has been carefully engineered letting the Hammer Rey rip across the terrain with confidence. By having fully independent suspension, it allows each side to react accordingly providing more control and more precise steering and handling.


Waterproof Electronics
Waterproof Electronics

The Hammer Rey 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.


Preset Motorplate
Preset Motorplate

Easier and precise gear mesh settings with different pinion choices.


LED Light Bars and Headlights
LED Light Bars and Headlights

The fun doesn't stop even when the sun goes down with the Hammer Rey. A brilliant LED lights on the integrated light bars cast more than enough illumination for running at night. Plus, the body-mounted LEDs place only a small demand on the battery allowing you to stay out all night!


Coil-over Oil-Filled Shocks
Coil-over Oil-Filled Shocks

The long-travel shocks do a fantastic job of soaking up the energy from big bumps and jumps. They also feature threaded shock bodies with adjustment collars so you can fine tune the pre-load settings of the coil-over springs.


Spektrum<sup>™</sup> S614S Metal Gear Servo
Spektrum S614S Metal Gear Servo

Improved high-torque servo provides robust steering.


Sealed Metal-Gear Transmission and Diffs
Sealed Metal-Gear Transmission and Diffs

The single-speed transmission, as well as the front and center diffs, are sealed against the elements and engineered to handle the abuse of a high-output brushless motor and punishing terrain. MOD 1 gears further increase the durability of this desert beast. The adjustability of three diffs allows drivers to set their Hammer Rey to handle any track conditions.


Rear-Loading Battery
Rear-Loading Battery

The innovative rear-loading battery feature makes it possible to change the battery quickly, easily and without the inconvenience of removing the body.


Longer Wheelbase
Longer Wheelbase

The longest wheelbase on the Rey platform for increased performance and added stability at speed.


The Full-Throttle Freedom of AVC<sup>®</sup> 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 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.



Every weekend off-road racing driver, Casey Currie's feet are touching dirt and the gas pedal. His career has taken him all over the world with a highlight being his threepeat at the Baja 1000 in 2017, 2018, and 2019.

Full-scale U4 race trucks are a unique breed. Not only are they expected to cruise at 90MPH across the desert, but also have the torque and driveline strength to get over rock formations that look impossible to navigate.

One reason Casey Currie and his U4 race truck works so well with the Rey platform was the featured independent suspension up front and solid axle in the rear. Of course with Losi, drivers get as much detail as possible while preserving the performance and durability the Rey platform is known for in the RC racing community. The combination is a one-way ticket to victory after victory, bred for the desert and ready to impress.


Footer Image of Losi Hammer Rey  

Spec Data
Scale 1/10
Motor type 3150Kv Non-Sensored Brushless

Related Items

Completion Guide - BEST

Image Item Id Name Trade SSP Order
  O-SPMX53S100H5 11.1V 5000mAh 3S 100C Smart G2 Hardcase LiPo Battery: IC5 £99.99  
  O-SPMXC2050I S155 G2 1x55W AC Smart Charger £74.99  

Completion Guide - GOOD

Image Item Id Name Trade SSP Order
  O-SPMX53S50H5 5000mAh 3S 11.1V SMART G2 50C IC5 £84.99  
  O-SPMXC2050I S155 G2 1x55W AC Smart Charger £74.99  

Optional Parts

Image Item Id Name Trade SSP Order
  G-PRO6352-00 2" Ultra-Slim LED Light Bar Kit 5V-12V (Straight) £27.50  
  G-PRO6352-01 4" Ultra-Slim LED Light Bar Kit 5V-12V (Straight) £29.99  
  G-PRO6352-02 5" Ultra-Slim LED Light Bar Kit 5V-12V (Curved) £34.99  
  G-PRO6352-03 6" Ultra-Slim LED Light Bar Kit 5V-12V (Curved) £39.99  
  O-SPMX50003S100H5 5000mAh 3S 11.1V 100C Smart LiPo Hardcase; IC5 £94.99  
  O-SPMX50003S50H5 5000mAh 3S 11.1V 50C Smart LiPo Hardcase; IC5 £84.99  
  O-SPMX52S100H5 7.4V 5000mAh 2S 100C Smart G2 Hardcase LiPo Battery: IC5 £79.99  
  O-SPMX52S50H5 5000mAh 2S 7.4V SMART G2 50C IC5 £64.99  
  O-SPMX53S100H5 11.1V 5000mAh 3S 100C Smart G2 Hardcase LiPo Battery: IC5 £99.99  
  O-SPMX53S30H5 5000mAh 3S 11.1V SMART G2 30C IC5 £74.99  
  O-SPMX53S50H5 5000mAh 3S 11.1V SMART G2 50C IC5 £84.99  
  O-SPMXC2010I S2200 Smart G2 AC Charger 2x200W £269.99  
  O-SPMXC2020I S1200 Smart G2 AC Charger, 1x200W £154.99  
  O-SPMXC2040I S1400 Smart G2 AC Charger 1x400W £219.99  
  O-SPMXC2050I S155 G2 1x55W AC Smart Charger £74.99  
  O-SPMXC2090 S100 1x100W USB-C Smart Charger £29.99  
  O-SPMXPSS300I Smart Powerstage Surface Bundle: 5000mAh 3S LiPo Batt/S155EU £139.99  
  P-SPMR5025 DX5 Pro 2021 DSMR TX Only £369.99  
  P-SPMS612HV 12Kg Servo, WP, Metal, 23T £49.99  
  P-SPMSS6250 S6250 Ultra Torque High Speed Digi WP Servo-Metal Gear £129.99  
  P-SPMSS6260 S6260 High Torque High Speed Digi HV Servo-Metal Gear £129.99  
  T-DYN2814 Hex Driver: 1.5mm £5.99  
  T-DYN2815 Hex Driver: 2mm £5.99  
  T-DYN2816 Hex Driver: 2.5mm £5.99  
  T-DYN2900 Machined Hex Driver, Red: 1.5mm £10.99  
  T-DYN2901 Machined Hex Driver, Red: 2.0mm £10.99  
  T-DYN2902 Machined Hex Driver, Red: 2.5mm £10.99  
  T-DYN2904 Machined Hex Driver Metric Set, Red £27.50  
  Z-LOS232011 Rear Diff Locker: Baja Rey £19.99  
  Z-LOS331003 Adjustable Turnbuckle Set: Baja Rey/Rock Rey £32.50  
  Z-LOS331004 Aluminum Rear Upper Link & Space Set: BR/RR £32.50  
  Z-LOS334001 Aluminum Front Spindle Set: Baja Rey £64.99  
  Z-LOS334002 AL Axle Housing Upper Track Rod Mount: BR/RR £39.99  
  Z-LOS334003 AL Upper/Lower Blkhd Track Rod Mount St:BR/RR £39.99  
  Z-LOS334006 Aluminum Lower Rear Trailing Arm Set: Baja Rey £39.99  
  Z-LOS43006 Wheels (4): Baja Rey £32.50  
  Z-LOSA99172 Camber Gauge £19.99  
  Z-LOSA99173 Ride Height Gauge £19.99  
  Z-LOSA99174 Car Stand: 8IGHT/T £19.99  

Replacement Parts

Image Item Id Name Trade SSP Order
  M-SPMXSM1000 Firma 3150Kv Brushless Motor £74.99  
  P-SPM2340 DX3 3Ch DSMR Radio w/SR315 £109.99  
  P-SPMS614S S614S 15kg Steel Gear WP Servo 23T £39.99  
  P-SPMSR6200A 6200A 6CH AVC Surface RX £79.99  
  P-SPMXSE1130 Firma 130A Brushless Smart ESC, 2S-4S £164.99  
  Z-LOS13002 Light Set: Hammer Rey £32.50  
  Z-LOS230013 Body Button Base & Top (22): Baja Rey £10.99  
  Z-LOS230095 Grill, Headlight Housing, Lens: Hammer Rey £10.99  
  Z-LOS230096 Faux Sway Bar Set: Hammer Rey £19.99  
  Z-LOS230097 Accessory Set: Hammer Rey £19.99  
  Z-LOS230098 Body/Driver Set, Red, Silkscreened: Hammer Rey £89.99  
  Z-LOS230099 Body/Driver Set, Green, Silkscreened: Hammer Rey £89.99  
  Z-LOS230100 Body/Driver Set, Clear: Hammer Rey £79.99  
  Z-LOS231006 Battery Tray,Door, Lock, 2S Spacer: Baja Rey £10.99  
  Z-LOS231012 Motor Mount: Baja Rey £19.99  
  Z-LOS231013 Steering Hardware Set: Baja Rey £10.99  
  Z-LOS231085 Rear Bulkhead, Fan Panel: Hammer Rey £12.99  
  Z-LOS231086 Front Bumper, Brace, Skid Plate: Hammer Rey £11.99  
  Z-LOS231087 Cage, Side, Sliders & Mirrors: Hammer Rey £32.50  
  Z-LOS231088 Cage, Roof, Bed: Hammer Rey £10.99  
  Z-LOS231089 Cage, Hood, Radiator Mount: Hammer Rey £12.99  
  Z-LOS231090 Cage, Grill, Tank Mount: Hammer Rey £10.99  
  Z-LOS231091 Tire Mount, Tank: Hammer Rey £19.99  
  Z-LOS231092 Exhaust: Hammer Rey £11.99  
  Z-LOS231093 ESC/Switch Mount, Brace: Hammer Rey £10.99  
  Z-LOS231094 Servo Mount, Steering Parts: Hammer Rey £19.99  
  Z-LOS231096 Shock Tower, Track Rod Mount: Hammer Rey £19.99  
  Z-LOS231097 Chassis with Motor Cover Plate: Hammer Rey £39.99  
  Z-LOS231098 Center Chassis Brace & Standoffs: Hammer Rey £19.99  
  Z-LOS232002 Center Transmission Housing: Baja Rey £10.99  
  Z-LOS232005 Rear Driveshaft Set: Baja Rey £79.99  
  Z-LOS232006 Hex, Rotor, Caliper & Pin Set (4): Baja Rey £32.50  
  Z-LOS232007 Center Transmission Gear Set: Baja Rey £19.99  
  Z-LOS232012 Center Outdrive Set: Baja Rey £19.99  
  Z-LOS232014 Rear Axle Shaft Set: Baja Rey £19.99  
  Z-LOS232019 42T Ring & 12T Pinion Gear:BR/RR £49.99  
  Z-LOS232020 Front Axle, (1): Rock Rey £64.99  
  Z-LOS232021 Front Sliders: Rock Rey £10.99  
  Z-LOS232022 Front Outdrive Shaft: Rock Rey £10.99  
  Z-LOS232051 Open ReDiff GeSet: BR RR £19.99  
  Z-LOS232072 Axle Housing Set, Rear: RR, BR, HR £19.99  
  Z-LOS232073 Center Driveshaft: Hammer Rey £19.99  
  Z-LOS232074 Front Gear Box, Set: Hammer Rey £12.99  
  Z-LOS232075 HD Diff Housing and Internals: HR, RR, BR £19.99  
  Z-LOS233001 Shock Ends, Tops, Piston: Baja Rey £19.99  
  Z-LOS233002 FR/RR Shock Body & Collar Set: Baja Rey £19.99  
  Z-LOS233003 FR/RR Shock Shaft Set & Hardware: Baja Rey £19.99  
  Z-LOS233004 FR/RR Shock Seal & Limiter Set: Baja Rey £10.99  
  Z-LOS233032 Front & Rear Spring Set: Hammer Rey £11.99  
  Z-LOS233033 Secondary Rear Shock Complete (2): Hammer Rey £32.50  
  Z-LOS234003 Trailing Arm,Steering,Upper,Drag Link St: Baja Rey £19.99  
  Z-LOS234006 Front & Rear Sway Bar Links: Baja Rey £19.99  
  Z-LOS234007 Front Hinge Pins & Brace Set: Baja Rey £10.99  
  Z-LOS234008 7mm Steel Pivot Ball Double Boss (10): Baja Rey £19.99  
  Z-LOS234011 FR Suspension Arm Set: Rock Rey £19.99  
  Z-LOS234012 Caster Block Set: Rock Rey £10.99  
  Z-LOS234013 Steering Spindle Set: Rock Rey £19.99  
  Z-LOS234014 Camber&SteeringLinkSet:Rock Rey £10.99  
  Z-LOS235023 Hinge Pin Screw,FR (10):Rock Rey £10.99  
  Z-LOS236005 Clip, Wire Retaining: Hammer Rey £10.99  
  Z-LOS43053 Nitto Trail Grappler, KMC Wheel (2): Hammer Rey £39.99  

Used In

Image Item Id Name Trade SSP Order
  O-SPMXC2050I S155 G2 1x55W AC Smart Charger £74.99