I underestimated how heavily roads are salted in Austria. It cost me a chain (I just switched to wax-based lube, which is superior to oil-based lubes in almost all situations … except to prevent corrosion). And my fancy-schmancy XTR rear derailleur stopped working reliably.
I’m getting an XT rear derailleur since this is my daily, but I want to try to revive it. The problem seems to be with the clutch, sometimes it fails to provide any tension and the chain sags and drops off the chain ring.