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

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.