ARRMA 1/10 KRATON 4S 4X4 RTR Brushless Speed Truck

The KRATON 4S BLX RTR delivers ARRMA speed and strength in the ideal size for any monster truck basher — featuring a centre differential for maximum grip, an updated Spektrum brushless power system for extra punch, improved dirt protection, and two fresh colour options.

In the Box

(1) ARRMA KRATON 4S BLX 4WD 1/10 scale speed monster truck RTR
(1) Spektrum Firma 120A V2 Smart waterproof ESC
(1) Spektrum Firma 3668 2400Kv brushless motor
(1) Spektrum S662 metal-geared waterproof digital servo
(1) Spektrum 2.4GHz SLT3 transmitter and SR315 receiver
(4) AA batteries
(1) Instruction manual

For details on waterproof standards, please refer to the instruction manuals.

Needed to Complete

(2) 2S, (1) 3S, or (1) 4S hardcase LiPo batteries
(1) Compatible charger

Features

Metal centre differential for increased traction
Updated chassis with centre diff module, hinge pin bracing, and dirt drain
Outdrive protectors, taller side guards, and wishbone dirt guards
Higher-torque Spektrum S662 metal-geared digital servo with alloy centre case
Cooler-running Spektrum Firma 120A V2 Smart ESC
Improved battery retention system with wire clips
Fully assembled, finished, and ready-to-run
Spektrum SLT3 2.4GHz transmitter and dual protocol SR315 receiver
Spektrum Firma 3668 2400Kv brushless motor with ARRMA heatsink and cooling fan
EXB all-metal gear differentials
EXB CVD front and rear driveshafts
Wide 450 mm front and rear track for aggressive bashing
Long 547 mm chassis and 355 mm wheelbase for stable handling
Rubber-shielded bearings throughout
Centre support brace for maximum durability
Double wishbone front and rear suspension
Oil-filled aluminium shocks with silicone O-rings
High shock towers for increased suspension travel
Steering system with stone clearance
Tough black multi-spoke wheels
CNC-machined red anodised 17 mm wheel hubs
Multi-terrain dBoots COPPERHEAD 2 LP vented low-profile tyres
Adjustable turnbuckles
Adjustable ride height
Adjustable body mounts
Front bumper with protective lower front and rear skid plates
Wheelie bar with rubber wheels
2-year limited warranty (see website for details)

Overview

With massive tyres, an aggressive truck body, and a long wheelbase for stability, the 1/10 scale ARRMA KRATON 4S BLX Speed Monster Truck sits perfectly between agile 3S BLX bashers and powerful 6S BLX machines. The 4S BLX platform delivers next-level ARRMA performance, toughness, and speed, without stretching your budget. Fully factory-assembled on the latest evolution of the 4S BLX platform, this KRATON is ready to blast harder than ever before.

The strengthened, differential-compatible chassis now features a centre diff module housing an aluminium-cased centre differential. This setup delivers outstanding traction across a wide range of surfaces. With added protection from wishbone dirt guards, outdrive protectors, and taller side guards, the KRATON 4S BLX thrives on dirt, grass, and paved surfaces alike.

ARRMA has upgraded the 4S-capable Spektrum brushless power system to handle intense all-road action. A cool-running Spektrum Firma 120A Smart V2 waterproof ESC with IC5 connectors (EC5 compatible) provides stronger punch and smoother power delivery. Steering performance has been enhanced with a higher-torque Spektrum S662 metal-geared digital servo, improving control and precision at high speeds.

These updates build on a long list of proven ARRMA 4S BLX features. High shock towers, long oil-filled shocks, and wide suspension arms deliver plush, controlled suspension travel. Steel differential gears and EXB Extreme Bash CVD front and rear driveshafts ensure reliable power delivery under extreme conditions. ARRMA’s signature easy-access modular design is also retained, making maintenance quick and straightforward.

Made from durable rubber, the vented dBoots COPPERHEAD 2 LP tyres feature an aggressive tread pattern that delivers excellent grip across a wide variety of surfaces. The tough truck body includes a moulded rear wing and comes factory-finished in your choice of two striking colour schemes. Front and rear bumpers provide impact protection, while a wheelie bar with rubber wheels adds extra stunt potential.

Fully ready to run, the ARRMA KRATON 4S BLX Speed Monster Truck includes a 3-channel Spektrum SLT3 2.4GHz transmitter and dual protocol SR315 receiver. Add your recommended battery, charge up, and unleash serious ARRMA bashing performance.

Specifications

Approximate assembly time: No assembly required
Ball bearings: Full set, rubber-shielded
Battery: Sold separately
Body: Painted, decaled and trimmed
Brakes: Integral with ESC
Bushing material: Metal
Charger: Sold separately
Chassis: Moulded composite
Completion level: Ready-to-run
Connector type: IC5, EC5
Differential: 2 gear diffs
Drive type: Forward/brake/reverse
Drivetrain: 4WD
Final drive ratio: 12.48
Front track: 450 mm
Gear pitch: 0.8 MOD
Internal gear ratio: 2.85
LiPo compatibility: 3S, 4S
Max battery dimensions: 156 mm x 51 mm x 48 mm
Motor size: 3668–2400Kv
Motor type: Brushless
Pinion: 13T
Power system: 4S
Power type: Electric
Product height: 206 mm
Product length: 547 mm
Product weight: 4.2 kg
Product width: 450 mm
Radio: Included
Rear track: 450 mm
Receiver: Included
Scale: 1/10
Sensored: No
Servos: Included
Shock type: Aluminium body, oil-filled, coil-over springs
Speed control: Included
Spur gear: 57T
Steering type: 2WS
Suspension: Independent
Technology: Smart, dual protocol RX (DSMR/SLT)
Tyre tread: dBoots
Top speed: 88+ km/h
Vehicle size: Standard
Vehicle type: Monster truck
Water-resistant: Yes
Wheel hex size: 17 mm
Wheelbase: 355 mm