Spektrum Firma 4074 / 2050KV Brushless Motor (4-Pole / 5mm Shaft)

Regular price $124.99

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The Firma 2050Kv brushless motor is a perfect option for 1/7 and 1/8 scale buggy, truggy or monster trucks with a 3S-6S LiPo powered setup. Featuring a low cog 4-pole 8-magnet rotor design, CNC machined aluminum housing, insulated high purity copper windings, high-quality alloy steel 4mm output shaft, and precision bearings for high durability and smooth rotation. Preinstalled with 4mm gold plated bullet connectors for easy installation, and perfectly matched for the Firma 150 Smart ESC.



  • Perfect upgrade for 1/7 and 1/8 scale racers and bashers
  • Safe-D Shaft provides a C-clip locking point to prevent pinion gear slip
  • High-efficiency design
  • 6S LiPo power capable
  • High-quality 4-pole sintered rotor
  • 4mm gold plated bullet connectors
  • High-quality construction with precision ball bearings and hardened steel 5mm shaft



(1) 150A ESC


  • Part# SPMXSM1700
  • Connector Type: 4mm Bullet
  • Input Voltage: 12 - 25.2V (3-6S)
  • Maximum Continuous Current: 62A
  • Motor Design: Inrunner
  • Motor Size: 4074
  • Motor Type: Brushless - Sensorless
  • Number of Poles: 4
  • Outer Diameter: 1.57" (40mm)
  • Output: 5050W
  • Product Length: 2.9" (74 mm)
  • Product Weight: 0.92lbs (415g)
  • RPM/Volt (KV): 2050KV
  • Shaft Diameter: 0.196" (5mm)





(1) Spektrum Firma 4074 / 2050KV Brushless Motor



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