Rubbee is a electric drive system that fits onto any bike. It turns your pedal bike into an electric bike. The Rubbee works by transferring energy via a polyurethane wheel that spins the bike's wheel. The polyurethane wheel ensures the rubber to rubber contact and eliminates slipping even in wet conditions.
The Rubbee mechanical components are housed in a waterproof case so it will work in any weather or road condition. The 20000 mAh battery pack provides 800W of power and it is self charging. The inventors claim it only needs to be charged once every 5 years. The throttle is conveniently located on the handlebar so cyclists can adjust speeds up to 25km/h. When you want to pedal, a fixation pin is removed so the Rubbee won't interfere with the wheel.