Front Derailleur Troubleshooting

Knowing when to admit defeat and get help is probably the most underrated workshop skill you can have. Did it hurt the wallet much?

If it is just the very back part of the derailleur hitting the cranks, it could be that it is angled slightly wrong, unbolt the derailleur and angle the 'tail' inwards..again it has very slight clearances so may need a bit of fiddling.

Tricky. The thing I've found with limit-screws is you need to be patient and trim them no more than a quarter-turn at a time; the margin between my rear derailleur twanging the spokes and not making it all the way to the lowest gear is incredibly fine.

Is there a point at which your FD is *both* rubbing the chain *and* striking the crank? Not necessarily at the same time, but for instance doing one when seated and the other out of the saddle? If so, then the problem may be a bent crank; one way or another it's probably not fixable just by tweaking derailleur settings.

If not, I'd say to keep trying with very fine adjustments, and a lot of patience.

If the crank is striking the FD when it's correctly aligned (In relation to the large chainring.) either the crank is bent or the chainrings are assembled incorrectly.

Sorry just read you next post. 48t outer chainring? That could be your issue too, it could mean lowering the FD to a point where there is not enough clearance between the chainring and crank, so if your hell bent on running 48t you may need new cranks.