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Helix Core e*spec Direct Mount Chainrings feature our narrow-wide tooth profile, for reliable chain retention and an extra long wear life. Designed with an adjustable 13.5-15.5mm offset via spacer, they provide adaptability to both 53 and 55mm chainlines for Bosch CX and SX motor systems. Helix Core e*spec rings are cold-formed from steel then heat treated to provide excellent durability and toughness, all at a price that's easy on your wallet.
Chainline
53/55mm
Color
Black
Compatibility
Bosch SX / Gen4 CX Direct Mount
Material
4040 Steel
Size
34T, 36T
Weight
189g
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