Top speed with 26" bicycle: (With 48V batteries :~45kph, with 64V batteries: ~60km/h, with 72V batteries: ~70km/h). 2016 GNG Premium belt mid drive kit. CAN WORK with both 73mm bottom bracket and 68mm bottom bracket. | eBay!
Get the Bafang BBS02 for only $525 and transform any bicycle into an electric beast. Do up to 30mph and use the gears of your bike to shift into low and climb big hills.