The new Kreidler mountain bike features a 250 watt Bosch Motor with a range of 1 to 2 hours under normal use of assisted power. Travel is 120mm on the 27.5 wheel size. Power assist level can be configured and it works harder, the faster rpms you pedal. Operation is silent and motor noise is almost undetectable. And equally important, the bike looks dialed with clean lines atypical of electric bikes.