Metal scrapes next to sprocket
Hi,
Second time I find metal scrapes on the bike right next to front sprocket (first time I cleaned it off). After first time it appeared it seemed ok (no new metal) for a few days. Now it's back. Maybe it's just aggregating slowly.
I can see no obvious damage to sprockets.
I can see some metal missing and some wear on the "outside" of the chain (the part furthest from sprocket centers. That could be from the chain guard - the chain has started to "eat" into the guard (made of plastic I think). When the chain jumps (thumper with a bit uneven power diddtribution) the outside of chain hits the chain guard, which I guess is the point.
A mechanic in Croatia told me something might have bumped up from the road and crushed on the chain but I'm not so sure about that...
Bike seems to work fine, but not so nice finding pieces of metal near sprockets.
Any ideas?
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