e*thirteen Helix Race GR Direct Mount Chainring - 34t, For use with Helix Race GR Crank, SilverHelix Race GR chainrings are gravity optimized direct mount chainrings designed to withstand the punishment of downhill, bikepark, and freeride disciplines. They're crafted of AL 7075 T6, and highly CNC optimized for minimal weight penalty, and great looks. Paired with Helix Race GR Cranks, 7mm offset GR chainrings produce a 56. 5mm chainline suitable for most long travel bike geometries. Featuring e*thirteen's M4 narrow wide tooth profile, they