scooter hub drive wheel powers cargo bike

[kgyrobotron]

Anybody know how this will work??

 

[Frankenstein]

I would expect well, a little slow maybe, but the torque should be lovely if you're going to have some weighty cargo, at least you won't pass out going up a hill!

 

[CrazyDan]

Might be a little better if you mounted a pulley system to the rear wheel and remove the tire from the electric scooter wheel, kick it to the left and use it as the driver pulley. As it sits you'll have torque for days but don't expect over 5mph.

 

[kgyrobotron]

I get it, its like gears wheel spins 2.5 rear spins once...slower...but torque..well scratch this build.

 

[FurryOnTheInside]

It'll have the same speed and torque as the original scooter did.

 

[Frankenstein]

It'll have the same speed and torque as the original scooter did.

What about the upper rpm limit of an electric motor? Or are you suggesting it's weak enough it never was able to max out in the first place.

 

[FurryOnTheInside]

What about the upper rpm limit of an electric motor? Or are you suggesting it's weak enough it never was able to max out in the first place.

Rpm isn't particularly relevant because it's a friction drive. Tyre to tyre. The big tyre rolls along the road surface at the same speed as the little tyre rolls along the big tyre or would have rolled along the road surface.

 

[Frankenstein]

Rpm isn't particularly relevant because it's a friction drive. Tyre to tyre. The big tyre rolls along the road surface at the same speed as the little tyre rolls along the big tyre or would have rolled along the road surface.

Are you trying to troll me?

 

[FurryOnTheInside]

Are you trying to troll me?

Not in the slightest. Every inch the small tyre would have rolled along the road it now rolls along the big tyre, which rolls along the road. There's no change in the gearing compared to when it was a scooter.

 

[Frankenstein]

Not in the slightest. Every inch the small tyre would have rolled along the road it now rolls along the big tyre, which rolls along the road. There's no change in the gearing compared to when it was a scooter.

Oh wait a minute, you're right, that's analogous to a bicycle with a sprocket the size of the wheel, at which point the diameter of the wheel is no longer leveraging against the driving cog. So if the torque remains the same then so must the speed! Ahh!!