$22 motor for ebikes. What do you think?

I saw this ad on Aliexpress (http://s.aliexpress.com/fYFRzQN7?fromSns=) where they sell a 288W / 24V DC motor for 22 dollars. I thought about buying it and using it as a friction drive on the wheel of my bike. Since it has 12000 rpm, I would have to make a reduction of an average 1:60 to get 250 rpm on the bike wheel and have torque to move it. For this, the axle would have to have only 1 cm and be in contact with the tire of 60cm. Do you think it would work? Had she enough friction?

I dont know about that, I really do not know.
You could scrounge garage sales and look for a circular saw.
I believe SpinningMagnets did one just for fun.
Even though they are corded and use AC voltage, if I am not mistaken they could be run on DC voltage.

Next best option is the Unite Motors, $40usd inc s/h
250W 24V MY1016-Y No.B010583
https://www.ebay.com/itm/Unite-Motor-Electric-Razor-Electric-Bike-Motor-Model-MY1016-Y-No-B010583/312063788223?hash=item48a87384bf:g:QEIAAOSwVDZaAg0v

Or
https://www.ebay.com/itm/450W-24V-electric-bicycle-brush-motor-conversion-kit-w-control-thumb-throttle/152164190056?hash=item236db14768:g:hFgAAOSwrLxaji3h

A better step up would be the real deal
YESCOMUSA for $190usd + $71usd for s/h

or look on the online classifieds on Craigslist or in Canada Kijiji or right here on ES website.

brunomchd94 said:

I saw this ad on Aliexpress (http://s.aliexpress.com/fYFRzQN7?fromSns=) where they sell a 288W / 24V DC motor for 22 dollars. I thought about buying it and using it as a friction drive on the wheel of my bike. Since it has 12000 rpm, I would have to make a reduction of an average 1:60 to get 250 rpm on the bike wheel and have torque to move it. For this, the axle would have to have only 1 cm and be in contact with the tire of 60cm. Do you think it would work? Had she enough friction?

Click to expand...

If you just like the idea of that kind of DIY odd-ball project, then give it a try and let us know. If you want to build an e-bike cheaply, there are better ways.

I think Mr. Magnets has the right idea, but this is the wrong motor. 288w at 12,000rpm, too fast and too low power. Keep looking.

IIRC, any roller drive on a tire is going to have to roll at the same rate you want to roll along; as if it was actually rolling on the ground itself rather than the tire.

So if you have a really high RPM motor you'd have to have an external reduction (not using the tire for that) that drives a roller that drives the tire.

For that kind of project, free from the trash pile on pickup day is the right price. 8)

Cordless drill, saw, etc would run on 12-18v.

A car alternator comes to mind

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The alternator process is easier if you use a Delta configured alternator

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