Spektrum Firma 2050Kv Brushless Motor (4074)

The Spektrum Firma 2050Kv Brushless Motor (SPMXSM1700) is engineered for powerful 3S–6S LiPo setups and suggested compatibility with 1/7 and 1/8 scale buggies, truggies, and monster trucks. Its low-cog 4‑pole, 8‑magnet rotor, CNC‑machined aluminium housing and precision bearings deliver smooth, efficient performance and long-lasting durability.

Preinstalled 4mm gold‑plated bullet connectors make installation straightforward, and the Safe‑D shaft provides a positive C‑clip locking point to help prevent pinion slip. The motor pairs perfectly with the Spektrum Firma 150 Smart ESC for a balanced, high-performance system.

Key Features

• Low-cog 4‑pole, 8‑magnet rotor design for smooth power delivery
• CNC‑machined aluminium can with precision ball bearings
• Insulated high‑purity copper windings for high efficiency
• Safe‑D shaft with C‑clip locking point to reduce pinion gear slip
• 6S LiPo capable high-efficiency brushless inrunner
• Preinstalled 4mm gold‑plated bullet connectors
• High-quality construction for durability in demanding RC applications

Specifications

• Motor Type/Design: Brushless inrunner, 4 poles
• Size: 4074
• Kv: 2050Kv designation
• Connector Type: 4mm bullet
• Input Voltage: 12–25.2V (3S–6S LiPo)
• Maximum Continuous Current: 62A
• Output: 5050W
• Efficiency: 85%
• Shaft Diameter: 5 mm
• Outer Diameter: 40 mm
• Product Length: 74 mm
• Weight: 415 g
• Sensored: No

Suggested Compatibility

• 1/8 and 1/7 scale buggy, truggy and monster truck platforms using 3S–6S LiPo power

What’s Included

• Spektrum Firma 2050Kv Brushless Motor

Required To Complete

• 150A ESC