Evo TS-MI-EVO2260 38x90mm) 6 Pole Motor by Tenshock. 1. Powerful 6-pole core design for high torque output.2. Advanced assembly technology enables more efficient space utilization.3. CNC machined aluminum casing4. Silver windings for higher efficiency.5. Powerful sintered neodymium magnets6. High torque to weight ratio.7. The hand-wound weaving of the winding ensures the motor has excellent electrical characteristics! 8. Include a water jacket with an internal water channel to ensure water flows around the motor 9. High grade bearingsSpecs:Magnets: neodymiumWatts: 5500 with up to 6500 burst.Poles: 6Motor Shaft: 5mmCan Measures: 38mm diameter x 89.50mm longWeight: 440 GramsMounting Screw diameter required: 3mmBearing size: 5mm x 14mm x 5mm Connectors: 5.5mmOSE Suggests 30,000-40,000 total rpm. These are only guidelines, we suggest if you don't know how to pick the correct motor, please consult OSE first or other members of the RC Fast electric boating community, either at a local club or on our OSE Forums.