... )20''--28''(700C) wheel 3)Packaging detail:carton front wheel motor 500W The kit includes motor,controller,lithium ... ,disc brake,speeedometer,senor E-bike conversion kit -- Front(Disc brake available) or Rear kit Motor350W--1000W brushless ... typeFront/RearWheel size20'',22'',24'',26''or 28'' (700C) front/rearSuitable bike frame100mm front fork or 135mm rear fork spacingThrottleTwist intelligent speed ...