Features: 1Standard specification 550 high torque and low noise brushed motor for RC car and boat. 2The front part is ball bearing with high precision and long service life Lengthened oil bearing shaft at tail, low noise and long service life. 3Extended oil?bearing sleeve at the tail, low noise, built?in cooling fan, with degaussing sleeve outside. 4Internal rotor adopts multi?pole winding, with strong torque and low?speed performance. Ordinary 3?winding rotor motor has finer linearity. 5There are 4 different types available, you can choose by your needs. 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 loadMaximum efficiencyMaximum Output PowerRotor blocked Current(A)314.436.270 Efficiency(%)7351 Output Power(W)78137 RPM2250018600112500 Torque(G.CM)41011902370 Voltages(V)7.4V Temperature?10?50 21T No loadMaximum efficiencyMaximum Output PowerRotor blocked Current(A)1724.748.3 Efficiency(%)7749.5 Output Power(W)4091 RPM12900113006450 Torque(G.CM)35013702730 Voltages(V)7.4V Temperature?10?50 29T No loadMaximum efficiencyMaximum Output PowerRotor blocked Current(A)16.32039.1 Efficiency(%)72.847.8 Output Power(W)3471 RPM1050090505250 Torque(G.CM)37013202630 Voltages(V)7.4V Temperature?10?50 35T No loadMaximum efficiencyMaximum Output PowerRotor blocked Current(A)0.63.812.524.3 Efficiency(%)76.149.7 Output Power(W)2246 RPM790068303950 Torque(G.CM)31011302260 Voltages(V)7.4V Temperature?10?50 Package Included: 1 x Brushed Motor