Specifications 21.5T Type Scale - 1/10th Brushed/Brushless - BL Sensored/Sensorless - SD Pole Count - 4 Relevant Parameters KV Rating - 2100 LiPo Cells - 2-3S No-load Current(A) - 1.7A Size & Weight O.D.(mm) - 36 Length (mm) - 48.5 Shaft Diameter (mm) - 3.175 Weight (g) - 148 Front Bearing - D11*D5*t5 Rear Bearing - D8*D3*t4