Meet the Rubbee X: a smart e-bike kit that turns your existing bike electric. It is completely wireless and comes with regenerative braking, safety features, and everything you need for a safe ride. You can install and detach the device in seconds. Its wireless cadence sensor allows your bike to track your cadence and provide electric assist automatically.
Rubbee X comes with modular batteries that can be removed. It also has LED safety lights. Riders will be able to track their rides and control the power output on their smartphone. Expected to ship in June.[where to get it]