I'm wondering what are indicators when FD begins to fail. Can you tell it while riding? When I changed my rear tire last year and took it for a ride the bike started shaking. I rode it home and checked to ensure the tire mounting was correct (although I didn't check torque on the mounting bolts/nuts). Everything was fine and it's only done it once since then if I remember correctly. I have put a few hundred miles on it since without issue. Could this be an indicator of FD failure or could it be tire mounting related? I'd probably better drain the FD and check for metal flaking. The tire is a Metz 880.