Rubbee X is probably the easiest electric bicycle conversion kits to install. Attach the lock mechanism onto the seat tube of Your bicycle and insert Rubbee X into it. There’s also a small wireless cadence sensor that must be attached to Your pedal crank before the first ride. But don’t worry – no wires or magnets go to or from it, just two cable ties to secure it and You’re good to go ! Rubbee X is considered to be the best e bike conversion kit regarding ease of installation.