My EZEE geared motor is 3,7kg and has done more then 9000km in 21 months.don't get a tongsin motor or a Tarn motor. i would advise against getting any small geared hub motor with split axle design. they all suffer from ring gears that snap and motors that skip. i got flecced on flee bay over a tarn motor. it had a snapped ring gear and it seems to be way too common among this type of motor. all direct drive motors are robust and rapairable and will last almost forever. any geared hub motor that weighs under 4Kg is bound to break inside 6 months.