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Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor
Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor
Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor
Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor
Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor
Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor
Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor
Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor
Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor
Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor
Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor
Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor
Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor
Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor
Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor
Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor

Hobbywing XR10 Justock G3S ESC Combo With G2.1 10.5T Motor

Brand: Hobbywing

Part No: HW38020370

£112.49 RRP £124.99

In Stock: Usually ships same day

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The Hobbywing XR10 Justock G3S ESC Combo with G2.1 10.5T Motor (HW38020370) pairs the XERUN XR10 Justock G3S zero-timing speed control with the Justock G2.1 4000KV fixed-timing motor for fair and consistent spec-class racing. Reliable hardware and advanced software deliver efficient power, smooth throttle feel and robust protection features for club and national rulesets.

ESC Features (XR10 Justock G3S)

  • Built-in capacitor for a clean, space-saving installation
  • Reverse connection protection to help prevent damage from incorrect battery polarity
  • Multiple protection circuits: low-voltage cut-off, over-temperature, fail-safe (signal loss) and motor lock-up protection
  • Firmware upgrade support (Multi-function LCD Program Box Pro or OTA Programmer required)
  • RPM speed limit function with up to 79 selectable RPM values via Program Box Pro or OTA Programmer

ESC Specifications

  • Scale: 1/10 & 1/12
  • Brushed/Brushless: Brushless
  • Sensored/Sensorless: Sensorless/Sensored
  • Waterproof: No
  • Motor Limit: >10.5
  • Continuous/Peak Current: 60A/380A
  • Input Voltage: 2S LiPo only
  • BEC Output (Switch Mode): 6.0V/7.4V @ 4A
  • Input Wires: Black-14AWG-200mm ×1, Red-14AWG-200mm ×1
  • Output Wires: Black-14AWG-200mm ×3
  • Input Connectors: No
  • Output Connectors: No
  • Fan Size: 25 × 25 × 10mm
  • Fan Voltage Range: 5–7.4V
  • Programming: LCD Program Box G2/Pro supported; OTA Module WiFi supported
  • Size: 40.9 × 33.9 × 32.1mm
  • Weight: 75.4g (inc. wires)

Motor Features (Justock G2.1 10.5T)

  • Heat-resistant magnet with aluminium case
  • High precision balanced rotor for smooth, linear power
  • Built-in Hall sensor and non-adjustable end bell (fixed timing)
  • Double insulated windings and high-precision bearings
  • Silicon O-ring seal aids heat transfer and helps protect the sensor area
  • Designed for easy cleaning and maintenance
  • Complies with IFMAR and ROAR specifications

Motor Specifications

  • Scale: 1/10 & 1/12
  • Brushed/Brushless: Brushless
  • Sensored/Sensorless: Sensored
  • Timing: Fixed
  • KV: 4000KV
  • LiPo's: 2–3S
  • No-Load Current: 4.9A
  • Diameter/Length: 35.9mm × 52.5mm
  • Shaft Diameter: 3.17mm
  • Bearing Size (Front/Rear): 9.525 × 3.175 × 3.967mm
  • Poles: 2
  • Weight: 175g
  • Applications: Stock/Sport Class 1/10th Buggy, Truck, On-Road, Drift Class

Applications & Suggested Compatibility

  • Zero-timing spec racing with 1/10th touring cars, 1/12th pan cars and F1 series (ESC)
  • 1/10th and 1/12th on-road and off-road use; stock/sport class buggy, truck, on-road and drift (motor)

The XERUN XR10 JUSTOCK G3S ESC is specifically designed for Zero-timing racing class. Its timing system has been permanently set to ZERO degree. Using the same branded motor and winding will ensure that every racer will have the same power system for 100% fair and competitive racing.

Reliable hardware combined with advanced software technology allows the XERUN XR10 JUSTOCK G3S to not only provide high power output, but also overload protection of the ESC circuit.

This ESC is designed for 1/10th scale touring cars & 1/12th scale pan cars as well as the ever popular F1 series cars for all Zero-timing spec racing. The ESC features an RPM speed limit function and is able to support up to 79 different RPM speed selections to meet the needs and demands of various competitions in the world.

Features
  • The built-in capacitor avoids the trouble of finding installation position for the external capacitor module, saves space and is convenient for layout
  • The built-in reverse connection protection circuit prevents damaging ESC due to reverse connection of battery
  • Multiple protection circuits, battery low-voltage cut-off protection, over temperature protection, fail safe (throttle signal loss protection) and motor lock-up protection
  • Supports firmware upgrade of ESC (Multi-function LCD program box Pro or OTA Programmer need to be purchased)
  • Supports various RPM limit values to meet the needs of different races. It can be set directly by the program box pro or OTA programmer
Specifications

Scale: 1/10 & 1/12
Brushed/Brushless: Brushless
Sensored/Sensorless: Sensorless/Sensored
Waterproof: No
Motor Limit: >10.5
Cont./Peak Current: 60A/380A
Input Voltage: 2S Lipo Only
BEC Output: Switch Mode: 6.0v/7.4V @4A
Input Wires: Black-14AWG-200mm*1 Red-14AWG-200mm*1
Output Wires: Black-14AWG-200mm*3
Input Connectors: No
Output Connectors: No
Fan Size: 25 x 25 x 10mm
Voltage Range: 5-7.4V
LCD Program Box: G2/PRO Supported
OTA Module: WiFi Supported
Size: 40.9 x 33.9 x 32.1mm
Weight: 75.4g (inc Wires)

HobbyWing Justock G2.1 Motor

Following on from the success of the HobbyWing Justock G2 the Justock G2.1 feature fixed timing and easy to use solder joints, making it an excellent motor for stock or sport class races where a controlled motor is needed.

The Justock G2.1 has a heat-resistant magnet attached to the aluminium case, double insulated windings, high precision bearings and a rotor with a strong structure which guarantees outstanding performance and increased durability. The built-in hall sensor and non-adjustable end bell combined with the high precision balanced rotor guarantees a smooth linear power delivery.

The silicon 'o'-ring seal fitted between the end bell and stator helps to conduct inner heat to the motor case and prevent dust from entering the hall sensor. The case is designed for daily cleaning and maintenance which can prolong the service life of the motor and improve its operating efficiency.

This motor is perfectly matched with the XR10-Justock G3S ESC for all zero timing spec racing and also compatible with other Hobbywing Electronic Speed Controllers.

Features
  • Heat-resistant magnet and aluminium case
  • High precision balanced rotor
  • Applicable to 1/10th, 1/12th on-road and off-road vehicles
  • Perfectly matched with the XR10-Justock G3S ESC
  • Complies with IFMAR, and ROAR specifications
Specifications

Scale: 1/10 & 1/12
Brushed/Brushless: Brushless
Sensored/Sensorless: Sensored
Timing: Fixed
KV: 4000KV
LiPo's: 2-3S
No-Load Current: 4.9A
Diameter / Length: 35.9mm (1.41") 52.5mm (2.07")
Shaft Diameter 3.17mm (0.125")
Bearing Size (Front/Rear): 9.525*3.175*3.967mm
Poles: 2
Weight: 175g
Applications: Stock/Sport Class 1/10th Buggy, Truck, On-Road, Drift Class




Key Info:
  • Brand: Hobbywing
  • Part No: HW38020370
  • Barcode: 6938994416801
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Questions & Answers
Real questions from real customers. Why not ask your own?
Will this be a good upgrade for my rb10 team associated?
Logan / 22nd June 2025

It depends 10.5t is quite slow we would recommend SCH-SK-400003-65 and this HW30125002 that would be much quicker.

Steve @ Wheelspin Models
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