Upright leisure riding Shimano Steps E6000 is lighter and more affordable than similar city systems from Brose or Bosch, and the performance is no slouch compared to the most common 20mph city oriented motor, the Bosch Active line. Like Bosch, they use a proprietary battery along with their motors. Batteries for City systems are externally mounted on the back rack or frame mounted on the downtube, and on the small side at 400 watt hours. Overall the system is less bulky and lighter - and price ranges of 2-3k they lead the industry for value in a mid drive.
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