Danish company Bike2 has come up with an interesting variation on a e-bike with a chainless drive system, where your pedalling generates power via a central located crankbox generator, which provides direct drive power to the rear mounted 250 watt brushless wheel hub motor. There’s 70 Nm of torque at 80 rpm.
There are 3 fixed cadences of 50, 60 and 80 rpm with ratios between 0.8 and 4 via stepless or automatic gearing to provide maximum speeds of 15, 20 and 25 km/h (as per pedelec regulation for the 25 kph speed). The cyclist’s power input is multiplied by 1 to 3 times, which is fairly normal for an e-bike. What is different is the way the power is transmitted.
The company was founded in 2011 to develop and distribute this drive system. The founders Nils Sveje and Jesper Allan Hansen have received investment funding from Borean Innovation and support from Nordea Ivaeksaetterfond and Welfare Tech Invest. They are looking to supply the technology to bike manufacturers. As a Launchpad, they had entered the Seoul Cycle Design Competition in 2010 and beat some 3000 others to win it. It is quite something to conceive a bike with electrical transmission that can be powered by an amateur rider, although having the battery is obviously a benefit.