Helix Core e*spec Steel E-MTB Chainring tool which create a more efficient

which create a more efficient rolling contact patch through the center tread

reduced noise and system wear

simplifying maintenance tasks

Match and personalize the way you want

5mm BB spacer and is held on by the drive side bottom bracket cup

Helix Core e*spec Steel E-MTB Chainring tool which create a more efficientHelix Core e*spec Direct Mount Chainrings feature our 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. Long lasting and economical steel construction M4 narrow wide tooth profile (our latest M5 profile on Avinox rings) for excellent chain retention and