Motor Id

saneagle

Esteemed Pedelecer
Oct 10, 2010
8,198
3,746
Telford
It's a band brake motor, like those fitted to the Cyclamatic Power Plus and a load of similar bikes. The only thing that affects the wheel size is the speed, so stick the axle in a vice or frame and power it up to see how fast it spins. If it's too slow for whichever wheel size you want, you can run it at 48v. To get the speed, stick a magnet on it and use a cycle computer or use any controller with an LCD.

If you're lucky, it's 180 rpm, which gives you the most options.