Bottom bracket replacement bearing
Your bike has an FSA Omega crank that does in fact have a 19mm spindle. All press fit BB types either use a 24 or 30mm spindle, so you must have a special BB unit. I'm guessing that it's an FSA 19mm to BB86.

You should confirm that you have a BB86 frame, you can do that by measuring the width of the BB shell, it should be about 86mm.