I find a lot of clams about range of various motors hard to believe. Here is the real world range I get on my bikes. I ride full throttle most of the time. A lot a folks new to ebikes are getting dissapointed by the reality. Range claims are rarely at full throttle, but we need to get to work on time.
Schwinn trike, BD36, 36volt 12ah lead battery that came with it.
Full throttle on nearly flat ground half uphill and half downhill. 6 miles at 25 mph, much slower as the battery dies of course, till the battery light goes on. Maybe 1 more mile can be squeezed out after a wait. 8 miles at 15 mph.
To work, 5 miles very slight downhill, 1 mile steep downhill, 6 miles rolling ups and downs. By keeping the speed under 15mph except on the downhills which are coasted and lots of peadaling on the first 5 miles, I just make it there as the battery light goes on. 700 foot vertical drop on the ride.
Back , All uphill now pretty much, and I'm lucky if reach the bottom of the hill without the battery light on. After a 15 minuite wait, I can just make it to the top of the hill before the battery dies. 5 miles from home and a dead battery, uphill too but not very steep. By the time I get 1/2 mile from home, I may get one last squirt of juice out of the badly overdischarged battery.
One of the issues with this bike is poor aerodynamics and its heavy. I tried 48 volts and carrying B&D 24 volt drill packs, but never got any closer than 4 miles from home when I ran out.
Same bike with ping 36 volt 20 ah lifepo4. With the 20ah lithium, Its still hard to get the heavy trike up the big hill, but I make it all the 12 miles home at full throttle all the way. 25 mph on the flats. Because of gearing, I can't help peadle above 15 mph.
Cheap wallmart MTB with BD36 and 36 volt 20ah ping lifpo4.
To work is no problem, get up to 30mph on the slight downhills. only use about 1/2 the battery based on charge time.
Back from work. Also no problem, full speed all the way. Good speed up the killer hill for most of it since there is little voltage sag. On a range test, after the 12 miles home, continued at full for 6 more miles till the battery light went on. 18 miles total, but I did not keep riding till the pack bms cut out.
So to sum it up, on the 12 ah Lead 6 to 8 miles.
On the 20ah lithium, 18 to 20 miles.
figure this into your purchase plans. Part of the problem with brushed is its fast, but it does go less far than brushless at the same speed. Much better ranges can be had, but 10mph is not my cup of tea, even without a motor helpig.