Originally Posted by
Duragrouch
With at least two concentric shafts, both laterally loaded and limited space, yeah I'll bet that the bearings were more complex. Bosch knows their stuff, and it's been my experience over the last 40 years, that Germans are particulary fussy about gear noise, their manual transmissions in particular were less noisy. But other countries have caught up since then.
but they do have a issue with rusting out if you ride in lots of mud. glad they changed over to a normal chainring though. well the sound is coming from the back so I guess I will take the chains off and see if its the bottom bracket. and try our spare wheel.