We use top of the line quality products on all of our bikes out power line up is as follows

60 VOLT SYSTEM

MOTOR: 2000 watt Bafang hub motor

Controller: 50Amp (bigger then most competitors).

BATTERY OPTIONS: Single: 20Amp, 25AMP, 30AMP, Double: 35Amp

BATTERT TYPE: Samsung 50gb CELL ( More punch)

72 VOLT SYSTEM:

Motor: Hentach 2200 watt with front 1500 watt option

CONTROLLER: 40AMP 

BATTERT OPTIONS: SINGLE: 20AMP Double 35 AMP 

BATTERY TYPE: Samsung 50gb cell (More Punch)