The heaviest thing on a bike is the rider, generally by a pretty good margin. I've seen plenty of bikes with shitty brakes, but very few where the straw that br

The heaviest thing on a bike is the rider, generally by a pretty good margin. I've seen plenty of bikes with shitty brakes, but very few where the straw that broke the camel's back was the weight of the ebike componentry. For most e-bikes, you're looking at maybe an extra 30lb/14kg. That's generally within the envelope of reasonable rider weights. If the combined bike and rider weight is too much for the brakes, it's probably also too much for the whole bike. Again, not that there aren't worthless brakes in the world, but it's usually not the weight of the battery and motor that pushes a set of brakes over the edge.