Spektrum Spektrum FIRMA 3900Kv 4-pole BL Motor

Overview
Great choice for 1/10 Scale 4WD models looking for a high RPM motor upgrade running up to 3S * (12.6v) power. Low cog 4-pole rotor design, CNC machined aluminum housing, insulated high purity copper windings, high-quality alloy steel 5mm output shaft, and high-precision bearings for high durability and smooth rotation. Preinstalled with 4mm gold plated bullet connectors for easy installation. Perfectly matched for the Firma 130 Smart ESC.

*Will work with the 85A Firma ESC, but only for 2S power.

Features
Perfect upgrade for brushed 540- and 550-size brushed motors with the same diameter and mounting pattern (vehicle must accept pinions with a 5mm bore)
High-quality 4-pole sintered rotors
Includes 4mm gold plated bullet connectors
Precision ball bearings and hardened steel 5mm shaft
SafeD-5 Pinion compatible

Specifications

Application
1/10 Scale Surface
Connector Type
4mm Bullet
Input Voltage
2-3S/12.6V
Maximum Continuous Current
45A
Motor Type
Brushless
Outer Diameter
1.4″ (36 mm)
Product Length
2.35″ (60 mm)
RPM/Volt (Kv)
3900Kv
Shaft Diameter
0.2″ (5 mm)