This is these video that convinced me to get the X5 serie hub motor:
The 5303 did not exist !!... it was the X503.. with 44mm stator width... just before they "upgrade" them to 34mm stator like we know now
X503
50mph on the highway lane...
And recently, the E-KMX !!.. that convinced me to spend 1200$ for geting one!
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