Helix Core e*spec Steel E-MTB Chainring tool 5mm BB spacer and is

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

Turbocharger upper sliders fit all e*thirteen e*spec Chainguides

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

Helix Race Gravel 12-speed

A dual end cap system means the same hub runs as either Boost 15mm or 15/20mm depending on your fork

Helix Core e*spec Steel E-MTB Chainring tool 5mm BB spacer and isHelix 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