Hobbywing Justock G2.1 21.5T Sensored Motor (Fixed Timing)

The Hobbywing Justock G2.1 21.5T Sensored Motor (part number HW30408012) delivers controlled, fixed‑timing performance for stock and sport class racing. Building on the proven Justock G2 platform, it focuses on smooth, linear power and long‑term durability for consistent lap‑after‑lap efficiency.

Inside, a heat‑resistant magnet is bonded to the aluminium case, while double‑insulated windings, high‑precision bearings and a robust rotor structure underpin reliability. The built‑in Hall sensor and non‑adjustable end bell ensure stable timing and precise throttle response. A silicone O‑ring between the end bell and stator helps conduct heat to the can and reduces dust ingress to the sensor. The case is designed to make routine cleaning and maintenance straightforward.

Key Features

• Fixed‑timing, sensored 21.5T brushless design for zero‑timing spec racing
• Heat‑resistant magnet bonded to an aluminium case
• Double‑insulated windings and high‑precision bearings
• High‑precision balanced rotor with a strong, durable structure
• Built‑in Hall sensor and non‑adjustable end bell for smooth, linear power delivery
• Silicone O‑ring helps transfer heat and shield the sensor from dust
• Convenient solder tabs for simple wiring
• Complies with IFMAR and ROAR specifications

Suggested Compatibility

• Pairing with Hobbywing XR10 Justock ESC for zero‑timing spec racing
• Use with other Hobbywing ESCs where a 21.5T fixed‑timing motor is required
• 1/10 and 1/12 on‑road or off‑road vehicles