top speed gearing

[CRAZYNIGHT]

Can someone offer me some guidence to what is probably the simplest of questions ever asked.

I have a electric bike with 20" wheels and am thinking of buying another.

Will a bike with 26/700c wheel have a higher top speed than that of one with 20" I know the gears will play a part but assuming the gear ratio is about the same will the wheel size make a difference. I am referring to pedal assist mode and not just motor they should both be limited to 15mph.

Thanks

 

[Deleted member 4366]

The motor manufacturers design different versions od their motors to run at different speeds for different size wheels, so in theory it shouldn't make a difference The speed of the bike depends on the choice of motor, the gearing and the size of the wheels. It's easier to get better climbing ability by using a low speed motor in a small wheel than it is to get high speed by putting a high speed motor in a big wheel, so I'd guess that you could make a general rulee that large wheel bikes are faster than small wheel bikes but don't climb as well assuming similar batteries and controllers.