Originally Posted by
sweeks
Here are a couple images of Shimano's STEPS motor.... Not exactly a simple machine!
Steve
Not any more complex than a Bosch or Bafang mid-drive. It's very well made, too.
My E6000 is a joy to ride with a 10-speed cluster in back. Much of the time on level ground where power assist isn't necessary, I switch it 'off' and the bike rides just fine.