Firma 3668 2400Kv 4-Pole Brushless Motor

The Spektrum Firma 3668 (2400 Kv) 4-pole sensorless brushless motor is engineered for serious performance in 1/10-scale RC cars and trucks. Built with precision and durability in mind, it offers strong acceleration and high top speeds, making it a solid upgrade for hobby racers.

Features

• 2400 Kv, 4-pole sensorless design—built for powerful acceleration and top-end speed
• Designed specifically for 1/10-scale vehicles (e.g., Arrma Kraton, Outcast, Mojave)
• Compatible with modern controllers using 4 mm bullet connector
• Robust construction engineered for demanding RC applications

What’s Included

• Spektrum Firma 3668 brushless motor (2400 Kv, Part#: SPMXSM2100)

Needed to Complete

• 30–45 A electronic speed controller that supports sensorless motors
• 2–4 S LiPo battery pack and appropriate gearing for your vehicle

Specifications

• Kv Rating: 2400 Kv
• Poles: 4
• Voltage Range: 2–4 S LiPo
• Shaft Diameter: 5 mm
• Motor Length: 68 mm
• Diameter: 36 mm
• Weight: ~288 g (~10.1 oz)
• ESC Connector: 4 mm bullet