Feature: 1. Standard specification 550 high torque and low noise brushed motor for RC car and boat. 2. The front part is ball bearing with high precision and long service life; Lengthened oil bearing shaft at tail, low noise and long service life. 3. Extended oil‑bearing sleeve at the tail, low noise, built‑in cooling fan, with degaussing sleeve outside. 4. Internal rotor adopts multi‑pole winding, with strong torque and low‑speed performance. Ordinary 3‑winding rotor motor has finer linearity. 5. There are 4 different types available, you can choose by your needs. Specification: .Condition: 100% Brand New Item Type: Brushed Motor Material: Metal Optional Type: 12T, 21T, 29T, 35T Size: 550 Color: Black Axle Diameter: D Axle 3.175mm Output Shaft Length: Approx. 15mm / 0.6in Outer Diameter: Approx. 36mm / 1.4in Body Length: Approx. 60mm / 2.4in Distance of Mounting Hole: Approx. 25mm / 1in Screw Hole: Approx. 3mm / 0.1in Fitment: Fit for 4 Series Car Model Fit for 6 Series Car Model 12T No load Maximum efficiency Maximum Output Power Rotor blocked Current(A) 3 14.4 36.2 70 Efficiency(%) 73 51 Output Power(W) 78 137 RPM 22500 18600 112500 Torque(G.CM) 410 1190 2370 Voltages(V) 7.4V Temperature ‑10‑50℃ 21T No load Maximum efficiency Maximum Output Power Rotor blocked Current(A) 1 7 24.7 48.3 Efficiency(%) 77 49.5 Output Power(W) 40 91 RPM 12900 11300 6450 Torque(G.CM) 350 1370 2730 Voltages(V) 7.4V Temperature ‑10‑50℃ 29T No load Maximum efficiency Maximum Output Power Rotor blocked Current(A) 1 6.3 20 39.1 Efficiency(%) 72.8 47.8 Output Power(W) 34 71 RPM 10500 9050 5250 Torque(G.CM) 370 1320 2630 Voltages(V) 7.4V Temperature ‑10‑50℃ 35T No load Maximum efficiency Maximum Output Power Rotor blocked Current(A) 0.6 3.8 12.5 24.3 Efficiency(%) 76.1 49.7 Output Power(W) 22 46 RPM 7900 6830 3950 Torque(G.CM) 310 1130 2260 Voltages(V) 7.4V Temperature ‑10‑50℃ Package List: 1 x Brushed Motor Note: 1. Please allow 1‑3mm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3. Product wire shipped without welding, splashing proof, can not soak in water.4. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.