Pads are probably Shimano g or j depending on if you want fins or not, assuming they're not new 4 pot XT or a too old to come on something with boost as a standard, so G04S for sintered steel backed etc.
Tyre is rim width based rather than hub, if the bike came with 2.8s you've probably got something around a 30mm rim, so maybe a nice 2.5 would be good.
Pads are probably Shimano g or j depending on if you want fins or not, assuming they're not new 4 pot XT or a too old to come on something with boost as a standard, so G04S for sintered steel backed etc.
Tyre is rim width based rather than hub, if the bike came with 2.8s you've probably got something around a 30mm rim, so maybe a nice 2.5 would be good.