What is Motor brand?

The motor is the part most likely to need attention, so the name behind it matters for support. A brand that lists its own motor keeps spare parts and software in its own hands, while a brand that fits a named supplier can draw on that maker's service network and diagnostics. Bike-Angebot.de covers several makers, listed as bafang, bosch and shimano, whereas Aventon fits only its own, own. Ask who services the motor before you buy, since motor cover often depends on using an approved part.