chas58 wrote: Those bottle batteries look nice, but I hear they don’t have much power (i.e. not much current capacity).
Beagle123 wrote:Thanks for the great thread.
I'm really interested in seeing the performance you get from these two bikes because I'm planning on making a dual hub motor bike with a low speed (210 rpm) motor on the back and a high speed (328) motor on the front. I want to use cute motors to keep the weight down.
What is the real "no-load" rpm (or speed) of each motor? I'd like to know how the no load speeds compare to the speeds you can actually achieve without pedaling. I'm imagining that your faster (328 rpm) motor will have a very fast top "no-load" speed, but will struggle with wind resistance when trying to go fast in the large (700c) rim. However I should be perfect for your application.
Please report back. I can't wait.
migueralliart wrote:So does this mean one can buy one of these motors for a rear 120mm spacing and it'll fit?
I was thinking lightweight single speed for my next endeavor.
Beagle123 wrote:Great report chas. I'm really getting a good understanding of what these motors can do now. I think you found an excellent way to use the 328 RMP cute motor, but it seems to me that most users would do best with the slower RPM version.
For me, I learned that I can't rely on it as a solo high speed motor to achieve 25+ mph alone. I will need a bigger motor with more watts.
chas58 wrote:Bafang makes 250rpm versions of the SWX series motor. With the ability to do 20mph, that would be a good compromise between the Q100 at 201rpm, and 328rpm. ... Or for both speed and torque, get a bigger heavier higher wattage (higher amp) motor.
chas58 wrote:For any future wheel builds, I will just order the motor, and use the $$$ saved with shipping to build the wheel locally. That way I can get any wheel I want, and support local businesses.
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