Mountain bikes can benefit from an electric battery like this one has. The battery powers a 250 motor which can help to get the bike up to speeds of 25km/h and it has a range of up to 100km in pedal-assist mode when fully charged, which takes 6-8 hours in total. It also has a Shimano double disc braking system for safety, so the rider will always feel in control. It has an ergonomic design so that the rider will also feel comfortable even on longer rides. It is 27.5 inches and suitable for adults between 160 and 200cm tall.