Enlarge / The Vanpowers City Vanture. Spotting the "e" on this e-bike at a glance is trickier than most. (credit: Kevin Purdy)
A "city" bike could mean many different things. It could be cheap, so there's less angst when it is almost inevitably stolen. It might be simple, with fewer gears and add-ons because the commutes are short and relatively flat. Or perhaps it's a lighter bike, one more easily hauled onto a curb or up a flight of apartment or office stairs.
Vanpowers' City Vanture is cheap and light only compared to other e-bikes (fully assembled, it costs $1,750), but its belt drive, internal hub, and five-level assist make it somewhat simple. It's also limited by a lack of accessory mounts and a gearing and motor setup that makes it more difficult to start and stop often in traffic or climb steep hills. For the right kind of rider, it could be a good pick. But you'll want to look closely at the City Vanture before choosing it for your urban or trail commute.
Oh, and you can build it yourself if you want to save a few bucks. This bike is a collection of interlocking tubes held together by mortise-and-tenon construction and bolt collars. You put the tubes together, run the cables through them, bolt everything else on, and put the wheels in place. More on that in a bit.
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source https://arstechnica.com/?p=1912001