• 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
Needed to Complete
  • Electronic Speed Control such as the Firma 130 Smart ESC
What's in the box?
  • Spektrum Firma 3660-3150kv Sensorless 1/10 Brushless Motor with 4mm Gold Plated Bullet Connectors