Neu 1506 Series 1506/1.5Y 6.7:1 Kv (rpm/V) 3700 Max Power (W) 1100W Max Amp (15sec) 80A Max Efficiency 90% Io (No load A) 2A Rm (Resistance) 0.008Ohm Shaft Diameter 6mm Gearbox 6.7:1 Motor Diameter 39.5mm Motor Length 67mm Motor Weight 230g Built in Fan N/A Max Rpm 60,000 Poles 4 Case Smooth ESC Timing 5-10 deg ESC Switching Freq. 11-13KHz