Spektrum Firma 1900Kv Brushless Motor

The Spektrum Firma 1900Kv Brushless Motor (SPMXSM1600) delivers smooth, efficient power for demanding 1/8 scale applications. Its low-cog 4-pole, 8-magnet inrunner design, precision bearings and insulated high-purity copper windings provide strong performance and durable running. A hardened 5 mm steel shaft with Safe-D locking feature helps prevent pinion slip, while pre-installed 4 mm gold-plated bullet connectors make installation straightforward.

This 4274-size motor is capable of up to 4,940W output with 86% efficiency and supports 3S–6S LiPo input. It’s perfectly matched for the Spektrum Firma 130 Smart ESC, offering a clean and reliable power system for high-performance builds.

Features

• Low-cog 4-pole, 8-magnet inrunner design for smooth power delivery
• Safe-D shaft with C-clip locking point to help prevent pinion gear slip
• High-efficiency build with insulated copper windings
• 6S LiPo capable
• High-quality construction with precision ball bearings
• Hardened steel 5 mm output shaft
• Pre-installed 4 mm gold-plated bullet connectors

Specifications

• Motor Type: Brushless Inrunner (Sensored: No)
• Kv: 1900Kv
• Size: 4274 (Ø42 mm x 74 mm)
• Outer Diameter: 42 mm
• Length: 74 mm
• Shaft Diameter / Length: 5 mm / 18.5 mm
• Poles: 4
• Input Voltage: 11.1–22.2V (3S–6S LiPo)
• Maximum Continuous Current: 60A
• Output: 4,940W
• Efficiency: 86%
• Connector: 4 mm bullet
• Weight: 416 g

Suggested Compatibility

• 1/8 scale buggy, truggy and monster trucks
• 3S–6S LiPo powered setups

In The Box

• Firma 1900Kv Brushless Motor

Needed to Complete

• 130A ESC (e.g. Spektrum Firma 130 Smart ESC)