e*thirteen Helix Race e*spec Chainring, 36T, Bosch Gen4 Direct Mount, 13mm Offset, Shimano/SRAM 11/12s Compatible, Black

Helix Core e*spec Direct Mount Chainrings feature a narrow-wide tooth profile, for reliable chain retention and an extra long wear life. Helix Core e*spec rings are cold-formed from steel and then heat-treated to provide excellent durability and toughness, all at a price that's easy on your wallet.