Spektrum Firma 3900kv 4-Pole Brushless Motor

SKU: SPMXSM3300

Spektrum Firma 3900Kv 4-pole Brushless Motor.

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