Answer: Yes. SRAM™️ Flattop™️ chains work well with our Helix cassettes! 

Both Eagle™️ and Flattop™️ chains will work with our cassettes. Sram™️ "road" 12 upper derailleur pulleys are about 0.25mm thinner than their MTB counterparts. This means that either Eagle™️ and Flattop™️ chains should have no issues on SRAM™️ gravel/road derailleurs but Flattop™️ chains may bind on the wider pulley teeth of a new 12s Eagle™️ rear derailleur.