Chainless Bikes

Chainless Bikes : Goto Reviews

Shaft drive on a bicycle. It seems like this would incorporate well with an electric motor, for an electric/human powered hybrid.

Power from the pedals is transferred to the back wheel of the bike via an enclosed shaft that works alongside a bevel gear system. The shaft itself is made of a lightweight yet durable aluminum alloy and should survive even the roughest of rides. The setup even allows for a three-speed Shimano gear system for ‘optimized pedaling efficiency.’ The biggest advantage of having all the gears and drive shaft enclosed is that the D-Drive system never requires cleaning, lubrication or maintenance.

via Metaefficient