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  • 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

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Spektrum Firma 3900kv 4-Pole Brushless Motor

SKU: SPMXSM3300
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Spektrum Firma 3900Kv 4-pole Brushless Motor.

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$135.99
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Spektrum Firma 3900kv 4-Pole Brushless Motor

SKU: SPMXSM3300
$135.99
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Spektrum Firma 3900Kv 4-pole Brushless Motor.

In stock

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