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.

e*thirteen Helix E*Spec Direct Mount Chainring eBike Chainrings and Sprockets EAN: 4710751509672