Regular electric mountain bikes with powerful motors and high capacity batteries are heavy and typically weigh around 25kg. But there are growing numbers of lightweight electric mountain bikes, sometimes known as 'half-fat' e-MTBs. These bikes are designed to be as light as possible and give lower levels of motor assistance so they feel more like a regular mountain bike. Models such as Orbea's Rise can be as light as 16kg and come with lighter electric components like 360Wh batteries to help keep the weight down.