Came across an interesting product called as "Rubee", which can turn a normal bicycle into an electric bicycle. You can fix the Rubee back of your seat and by placing its drive wheel on to your back tire. This makes the entire bicycle to function as e-bike. You can pedal with less strain when you need.
Check out their product videos:
Taking Rubbee for a spin from Rubbee Drive on Vimeo.
Rubbee on full suspension bicycle from Rubbee Drive on Vimeo.
Cheers, Kiran Kankipati (Author/Founder: TrafficSqueezer - www.trafficsqueezer.org)
Founder: Aquarium: http://doublefish-solutions.com/aquarium
Check out their product videos:
Taking Rubbee for a spin from Rubbee Drive on Vimeo.
Rubbee on full suspension bicycle from Rubbee Drive on Vimeo.
Founder: Aquarium: http://doublefish-solutions.com/aquarium