UDIRC Sierra UD1203PRO 1/12 4WD Brushless Trophy Truck RTR

The UDIRC Sierra UD1203PRO is a high-performance 1/12 scale 4WD brushless trophy truck designed for high-speed off-road driving.

Powered by a 2845 4700KV brushless motor and 60A electronic speed controller, the UD1203PRO can reach speeds of up to 80km/h when equipped with a suitable 3S LiPo battery.

The truck combines high-speed performance with a durable 4WD drivetrain, metal gears, centre differential, independent suspension and built-in gyro stabilisation, making it an exciting choice for both experienced RC drivers and those looking for a fast, easy-to-control off-road truck.

Powerful 4700KV Brushless Motor

The UD1203PRO is equipped with a 2845 4700KV sensorless brushless motor.

The high-KV motor provides rapid acceleration and strong top-end speed while remaining compact enough for the 1/12 scale platform.

The motor is paired with a 60A ESC for fast throttle response and reliable power delivery.

2S–3S LiPo Compatible

The UD1203PRO supports both 2S and 3S LiPo batteries.

With a suitable 3S LiPo battery, UDIRC advertises speeds of up to approximately 80km/h.

The battery compartment measures approximately:

• Length: 115mm
• Width: 38mm
• Height: 25mm

Battery and charger requirements depend on the version supplied. Check the product package before ordering batteries.

4WD Drivetrain

The Sierra features a 4-wheel-drive drivetrain designed to maximise traction on loose and uneven surfaces.

The drivetrain incorporates metal gears for improved durability when running the high-output brushless power system.

The vehicle uses a spindle/shaft-style transmission system and adjustable drivetrain components.

Centre Differential

Unlike many budget RC trucks, the UD1203PRO features a centre differential.

The centre differential allows the front and rear wheels to rotate at different speeds during cornering, improving handling, traction and stability when driving at high speed.

This is particularly useful when transitioning through corners or driving on loose surfaces.

Built-In Gyro Stabilisation

A built-in gyro stabilisation system helps the truck remain more stable during high-speed driving.

The gyro can assist with steering corrections, making the vehicle easier to control when accelerating hard or travelling over uneven surfaces.

The system can be adjusted to suit the driver's preference.

Independent Suspension

The UD1203PRO uses independent suspension designed for off-road driving.

The suspension allows each wheel to react independently to bumps and uneven terrain, helping maintain tyre contact with the ground.

The vehicle features approximately 30mm of ground clearance, making it suitable for dirt, gravel, grass and other off-road surfaces.

Durable Metal Drivetrain

High-strength metal gears are used throughout the drivetrain to help withstand the torque produced by the 4700KV brushless motor.

The metal drivetrain provides improved durability and reliable power transfer during high-speed driving.

Detailed Trophy Truck Styling

The UD1203PRO features a realistic trophy truck-inspired body with a wide stance and aggressive off-road appearance.

The polycarbonate body is designed to withstand the demands of high-speed off-road driving while maintaining the look of a full-size desert racing truck.

LED Lighting

The UD1203PRO includes vehicle lighting, providing additional visibility and scale appearance when driving in lower-light conditions.

2.4GHz Radio System

A 2.4GHz radio system is included, providing reliable control without the need to select individual radio frequencies.

The transmitter provides proportional steering and throttle control for precise operation.

Ready-to-Run

The UD1203PRO is supplied as an RTR (Ready-to-Run) vehicle.

The chassis is factory assembled, meaning only basic preparation is required before driving.

The package includes the vehicle, transmitter, decals, instruction manual and basic tools.

Key Features

• UDIRC Sierra UD1203PRO
• 1/12 scale
• Trophy truck / short course design
• 4WD
• 2845 4700KV brushless motor
• 60A ESC
• 2S–3S LiPo compatible
• Up to approximately 80km/h
• Centre differential
• Metal drivetrain gears
• Built-in gyro stabilisation
• Independent suspension
• Approximately 30mm ground clearance
• 2.4GHz radio system
• LED lighting
• Polycarbonate body
• Metal wheel adapters
• Ready-to-Run
• Spare front and rear suspension arms included

Specifications

• Brand: UDIRC
• Model: Sierra UD1203PRO
• Product Code: UDI-UD1203PRO
• Type: Trophy Truck / Short Course Truck
• Scale: 1/12
• Drive: 4WD
• Motor: 2845 4700KV Brushless
• ESC: 60A
• Battery: 2S–3S LiPo
• Top Speed: Approximately 50–80km/h
• Differential: Centre Differential
• Transmission: Spindle Transmission
• Servo: 3-wire 17g copper-gear digital servo
• Suspension: Independent
• Tyres: Ø73.3 × 30.5mm
• Wheel Adapters: 11.97mm metal
• Body: Polycarbonate
• Length: 375mm
• Width: 198mm
• Height: 139mm
• Wheelbase: 228mm
• Front Track: Approximately 165–168mm
• Rear Track: Approximately 165–168mm
• Ground Clearance: Approximately 30mm
• Battery Compartment: 115 × 38 × 25mm
• Radio: 2.4GHz
• Lighting: Included

What's Included

• UDIRC UD1203PRO Sierra RC truck
• 2845 4700KV brushless motor
• 60A ESC
• 2.4GHz transmitter
• Receiver
• Steering servo
• LED lighting system
• Decal sheet
• Spare front suspension arm set
• Spare rear suspension arm set
• 2.0mm hex driver
• 1.5mm hex driver
• Cross wheel wrench
• Instruction manual

Battery Required

The UD1203PRO is designed to run on 2S or 3S LiPo power.

For maximum advertised performance, a suitable 3S LiPo battery is required.

Please check the battery dimensions carefully, as the battery compartment is approximately 115 × 38 × 25mm.

Built for High-Speed Off-Road Driving

The UDIRC Sierra UD1203PRO combines a powerful 4700KV brushless motor, 60A ESC, 4WD drivetrain and centre differential into a compact 1/12 scale platform.

With built-in gyro stabilisation, independent suspension, metal gears and speeds of up to approximately 80km/h on 3S, the Sierra is designed for drivers looking for serious speed in a smaller RC package.

Please note: Actual speed will vary depending on battery, gearing, surface, tyre condition and operating conditions.