Frames are often aluminium or carbon fibre and use hydraulic disc brakes to prevent. The tyres are often wider than Individuals on an ordinary street bike for additional comfort and ease and traction. An electric bike can be a bicycle with an integrated electric motor run by a rechargeable battery. https://electric-cycle-australia38383.webbuzzfeed.com/39483496/kids-electric-bike-things-to-know-before-you-buy