Neu 1512 Series 1512/1D 6.7:1 1512/2D 6.7:1 Kv (rpm/V) 4875 2550 Max Power (W) 1100W 1450W Max Amp (15sec) 125A 125A Max Efficiency 90% 90% Io (No load A) 6A 2.3A Rm (Resistance) 0.002Ohm 0.006Ohm Shaft Diameter 6mm 6mm Gearbox 6.7:1 6.7:1 Motor Diameter 39.5mm 39.5mm Motor Length 82mm 82mm Motor Weight 350g 350g Built in Fan N/A N/A Max Rpm 60,000 60,000 Poles 4 4 Case Smooth Smooth ESC Timing 5-10 deg 5-10 deg ESC Switching Freq. 11-13KHz 11-13KHz