Sorry I wasnt very specific, it's the front wheel which keeps going out of alignment, as for the rear rim, it isnt welded really well, and there is a difference of 1mm where two end meet and that might be why I have an unfixable dip in the wheel.
I forgot to mention the crappy SuntourXCE28, and that sometimes I reach 30mph or more.
Does anybody know a good reliable company or website that has rims built specifically for hub motors, please ?