Leopard Brushless Sensored 540 Size Motor 1820Kv 21.5T 2-Pole for 1:10 RC Cars Maximum Amps: 13A LiPO Cell Count: 2-3S Shaft Diameter x Length (mm): 3.175mm x 15mm Motor Diameter x Length (mm): 35.8mm x 52.5mm Weight (g): 170g