I’ve got the sonder alpha 27.5s and all the spokes came loose on the rear wheel the second ride so i had to re-tension/true it up , hub is fine – not loud at all, the schwalbe hans dampf always weeped sealant at the bead unless i put loads of PSI in it – went up OK though i’ve put a layer of gaffer tape on it now to help it seal.
I’ve gone back to my old wheel on the ebike now as its seems to be waaay more robust and never weeped sealant (i bought a new rim and internals to do this after riding the sonders). The sonders are now on the HT which doesnt get as much abuse.
so just about OK for non-gnar purposes is my verdict – not that happy really but they were cheap!
the ebike is used for mainly jumpy dh fun. Well so it the HT but i dont ride it much due to teh ebike! and i call it trail riding as i have to pedal up!