1.) electric bicycles conversion kits 2.)Item no.:WL2607 3.)Motor:36v/180w- ... Charger included Battery weight: 3.5kgs Motor: Motor: brushless,rear disc brake motor. 36V250W Length:155mm Max speed: 25km/h ... ,mileage display, Max speed display Other: Brake: F/R disc brake, diameter: 160mm Derailleur: Shimano,7 gears, ACERA Light ... protect the environment much more clean ! electric bicycles conversion kits