There are a number of e-bike conversion kits on the market, all offering ways to electrify your existing wheels. Boost has emerged as an option with a more elegant and easier way of doing things than some of its rivals. Rather than wire in controllers, battery hardware and a hall effect sensor, almost all of the necessary gear is built into a custom-made rear-hub motor. Everything else, meanwhile, is included in a circular battery pack that sits inside a bottle cage, or something that looks a lot like it, which is mounted to your downtube.
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