1. Motor type: BLDC hub motor with permanent magnets
2. Motor design: twin off-axis with 17-inch rims
3. rim size: 2.5x17, 3.5x17
4. Matching tires: 110/70-17,90/90-17,120/70-17
5. magnet height and thickness: 40mm
6. Lamination: 0.35mm
7. Number of pole pairs: 24 pairs
8. Rated power: 3000W 
9. Rated voltage: 72V
10. Speed: 80-90km/h
11. Maximum no-load speed: about 800RPM
12. Maximum torque: 198N.M
13. Maximum efficiency: 87.5%
14. Brake type: disk brake
15. Width of mounted rear fork: 200mm
16. Winding bracket material: Iron
17. Bearing type: 6206/6205 
18. Phase section: 10mm2
19. Hall sensor phase angle: 120 degrees
20. Temperature sensor: optional
21. Maximum operating temperature: 70 degrees, peak 120 degrees
22. Waterproof rating: IP67
23. Color: Black
24. Northwest/G... Weight ： 17kgs / 18kgs 
25. Packing Size：44*43*34CM