For my xtc29er Giant HQ swapped out the rear rotor for a solid G3 rotor (no slots at all) and that fixed it for me.
A solution that's worked great for a friends Salsa with noisy elixers is wrap a piece of tube around the seat stay. It works well on the hardtail, it might work on the anthem too.
A solution that's worked great for a friends Salsa with noisy elixers is wrap a piece of tube around the seat stay. It works well on the hardtail, it might work on the anthem too.