FREE SHIPPING 15AH Wheel size :20/24/26/27.5/29 inch ((Suitable for tyre width size 1.75 to 2.25; 700C is equal to 29'') )Motor : 250W-500W brushless gear motor ;1000W direct drive motor Battery : Downtube Lithium battery/Rear rack carrier type batteryMax range :50KM-75KM Depends on battery capacityMax speed: 250W:25km/h;350W:35km/h;500W:45km/h;1000W:50km/hRim: Aluminium alloy double wall Controller: KT controller ,waterproof connection plug ,with light function Throttle: Thumb throttle PAS: 8 MagnetCharger :Australia safety standard Brake : Wuxing cut off ebrake ,suitable for disc brake or V brake bike brake system Riding Mode: Thumb throttle or pedal assist Front fork width requirement :98mm-102mm ;Rear fork width requirement:135-142mm.