Design calculations for my hybrid e-cycle

[spsutar]

i'm in the conceptual design stage of my e-cycle.

my tech reqs :

1. it should have a max speed of atleast 40 kmph.

2. gross weight = 120 kg

3. min range 30 km.

Please help me with the following design question.

how to estimate the motor & battery power requirements ?

 

[Aero51]

You need more specifications and assumptions. I'm not the best with cars so I can't point you to additional parameters with confidence.

 

[siddharth23]

How many gears? What are the gear ratios and gear diameters?