... , Frame:alloy 3)Derailleur: Japan Shimano 6~7 gears New Bicycle Electric of 700CSpecification:1. Motor: Rear drive, 250W, brushless, hub ... system11. Multi-function displayer: 3 levels PAS speed, power and light on/off 12. Improved PVC fenders, flexible & unbreakable13. Zoom ... /20'GP, 170units/40'GP26. Options (not free): front light & rear light, front-drive motor, lock, 36V/9Ah Samsung li-ion battery ...