... pollution,Light weight,high quality 3.Gained CE,EN15194 certificate Electric system: MotorHigh speed brushless, from 8FUN. -180W-500WBattery36V ... braking.TiresKENDA brand, 700x45RimDouble wall aluminum alloy.ChainRust resistent chain.DerailleurSHIMANO NEXUS inner 3 available.Options:Basket, Helmet. ... Speedmeter etc.Mudguard / Rear rack / Chain wheel / Crank / Pedal etc. All in aluminum alloy.