... Light weight,high quality electric bike Electric system: MotorHigh speed brushless,250W-500W, from 8FUN. -250W for ... protection circuit.PAS1:1 pedal assistant system . Speed sensor.- Throttle available.Controller3 speed available LOW - MED - HIGH.DisplayMulti- ... aluminum alloy.ChainRust resistent chain.DerailleurSHIMANO TOURNEY, 6/7 speed gears.SHIMANO NEXUS inner 3 available.Options:Basket, Helmet ...