Firma 2838 4500Kv Brushless Motor

The Spektrum Firma 2838 4500Kv Brushless Motor (SPMXSM4400) is a compact 4‑pole inrunner designed for 2S–3S (7.4–11.1V) systems. It features 3.5mm bullet connectors and a 3 mm shaft, with a 23 mm outer diameter and 38 mm length for easy installation in space‑conscious builds. Rated at 4500kV, it delivers high RPM performance for small RC power applications.

Specifications

• Connector Type: 3.5mm Bullet
• Input Voltage: 2S–3S, 7.4V–11.1V
• Motor Design: Inrunner
• Motor Type: Brushless
• Number of Poles: 4
• Outer Diameter: 0.9" (23 mm)
• Product Length: 1.5" (38 mm)
• RPM/Volt (Kv): 4500kV
• Shaft Diameter: 0.13" (3 mm)
• Shaft Length: 0.55" (14 mm)

In The Box

• (1) Firma 2838 4500Kv Brushless Motor