Great Value: E-bike conversion kits can be great value for money. If you have a ‘recipient’ bike languishing in the shed or have picked up a decent quality steed at a good price, it can be converted quite cheaply when compared to the cost of a new e-bike of similar quality. Do note the Fitter’s Responsibilities section below about the quality of the recipient bike you might want to fit a kit to.
Lightweight: Kits also make it possible to put together an incredibly lightweight electric bike – a total weight of 22 pounds or 10kg is actually possible, and if money really is no object even lighter! There are an increasing number of off-the-peg lightweight e-bikes available now however, though these are generally mid to high priced e-bikes, so e-bike conversion kits can still be an economic way to a lightweight e-bike. E-bike conversion kits that add a little over 3kg to the weight of a non electric bike are now widely available and there are even lighter options out there, though these tend to be rather light on the amount of power assist you get.
IMPORTANT NOTE: Kits containing illegal motors and control units are in the market, and many people are using them on the road, either innocently or otherwise. A fast and/or powerful kit can be a lot of fun, but bear in mind that once you exceed the parameters set in the regulations, you are on your own. In most territories, your bicycle will be treated as a moped in the eyes of the law, and subject to the much more stringent penalties that come with motorcycle use. If you are found responsible for injuring someone, you will be in very serious trouble. The electric bike legislation is a safety net for your protection, and you leave it at your own risk.