Thanks a lot for the info regarding the rear wheel bearings.
Here's what my original bearings looked like after 28.000 km (12.700 mi)
I guess i was lucky i found out they were crap now, instead of finding out during saterday's off-road ride and getting stranded away from home. To bad i wont be riding this saterday, but instead i will be doing an off-road course the 27th.
I've got new bearings ready. Will update during the week when i get it sorted out.
The new bearings will be double-seal versions. Is it still necesary to use the extra seals?
Number 4 and 21.