KV550Weight (g)391Dimensions (DxL) (mm)49.5x58.2Shaft Diameter (mm)6Mounting Holes (mm)4-M4, 30/30Input ConnectorsDB4Stator Dimensions (mm)4130Slots & Poles12N14PRi (mOhm)12Io @ 10V (A)2.1LiPo Cells5S, 6SEfficiency Current (A)50Burst Current (A)100Peak Power (15S) (A)2000Peak Torque (N.M)2.17Recommended ESCSUMMIT 120Propeller5S: 16x8E, 17x10E/ 6S: 15x6, 16x8EApplication/ Class90E: Equivalent of .75-.90 2-stroke engines, and up to .110 4-stroke engines