Originally Posted by
chas58
As I recall, the motors are pretty similar. The torque comes from the Amps (via the controller), but of course your motor has to be able to handle the power and load without overheating.
Generally I think EM3 and MAC are going to be your most reliable solution, just be aware of the screw on cassette. Plenty of people use BMP motors with no problem, but those Asian vendors, with the exception of EM3, are not very helpful with support.
Here is an article on MAC and comparison to BMC if you want the long answer:
http://www.electricbike.com/bmc-hub-motor-review/
(that is a good site to poke around on).
I'm pretty sure i'm going to go with a MAC 500 watter.
I'm not so sure about EM3 though. I've purchased a bunch of LED lights direct from Asia, and even the "best" vendors have sent me junk, or even the wrong part. And the return shipping is more than the worth of the loss.
With a hub motor, it would make the savings a complete wash.
So I might have to just find the best price I can on a US based vendor, and have them build the wheel too, so I don't have to worry about the screw on vs. slide on cassette.
And besides, I really don't want to wait a month for the shipping either. Once I decide on all the parts, I just want to get it done.