20" x 1.75 Hub motor single shaft

I need this bicycle wheel with a hoverboard hub motor. Low power, low speed, indoor. Where do I find that?

Hoverboard motors don't have spoke flanges, so you would have to custom build hardware to add spoke flanges to the motor so you can lace it up to a 20" bicycle rim, or custom build hardware to fit it to a "mag rim" that has "spoke arms" built into it.
 
Another option with a hoverboard motor is mounting it to the rear wheel "friction drive", or remove the tire and use motor and a pulley on the rear wheel with a belt.
 
How much load are you putting on it? An e-wheelbarrow motor bolted up on one side only might work for relatively light load capacity. That's not 20x1.75", but it's the next size down in diameter.
 
I'm in the process of using a pair of hoverboard wheels, drilling spoke holes. Found a couple of youtubes about it. Going to lace a pair of 20" bike rims to them. Building a light weight wheel chair for in house use. Thanks for the comments.
 
Get some 20" BMX rims and some non-marking tires for them (ISO 406 gray wheelchair tires or colored tires in a not too intense color).

You will cut down motor thrust in proportion to the diameter difference between hoverboard wheels and 20" bike wheels, and you'll raise the unloaded road speed by the same proportion. So it would be wise to lower operating voltage and raise amp rating (within reasonable limits of the motors you are using).
 
For a wheel chair, limiting the options to ready made drive systems that you can obtain used for under a hundred bucks, in under a couple of hours you could have a little kick scooter mounted on the chair underside. Ditch the front end, but keep the rest in tact. That, or bolt a golf buggy unit on, which would have lower speed and better traction due to the gear reduction and pneumatic tyres. I can’t see the sense in using hoverboard motors.
 
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