... front wheel motor QMWB 16,18,20,22,24,26,28 inch electric bike BLDC front wheel motor QMWBNOTICE: Model:QMWBvoltage ... -250Wspoke hole diameter:130mmSpeed:175-330rpmefficiency:80%wheel size:16-28”speed ratio:1:4.2net weight:≤3.3kgopen size:100mmfree ... geared permanent magnet motor 16,18,20,22,24,26,28 inch electric bike BLDC front wheel hub motor