I'm 215 lbs, 5'-7", 57 y.o., I use a 'kit' on an old 30 lb trek 800 26" cro-moly, 36 v pack 18lb, 25 A controller, 350 watt b/l front geared hub motor. So I like to pedal a bit and go about 15 mph on flats but cruise before an uphill. I use shifting and 20A throttle power going up and brakes...