Experience rugged reliability and refined performance with the e*thirteen Helix Core Alloy Crankset (165mm, 73 mm spindle, CS4HBA-104). Built for trail and enduro riders, this crank delivers strength, lightness, and versatility in one dependable package.

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  Material & Build: Forged AL-6066-T6 crank arms with integrated weight-reduction features and precision CNC machining keep the weight down while maintaining enduro-level toughness.

  
  


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  Spindle: A heat-treated 24 mm chromoly spindle paired with a 68/73 mm frame width ensures excellent bearing compatibility and durability.

  
  


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  Chainline Options: Achieve Boost (52 mm) or Super Boost (55 mm) chainlines with included spacers—enhancing rear tire clearance and drivetrain fit across a range of bikes. 

  
  


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  Compatibility: Works flawlessly with both SRAM® and Shimano® 11/12-speed drivetrains, delivering consistent performance with high-end flip-flop Helix Race or Helix Chainrings (28–34T), sold separately

  
  


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  Ease of Maintenance: Featuring a self-extractor bolt system and a creak-free Quick Connect interface, installation and removal are clean and worry-free—providing premium functionality without the premium price tag.

  
  

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  165 mm length – optimal for balanced pedaling leverage and clearance

  
  


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  FORGED AL-6066-T6 arms with CNC weight savings

  
  


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  24 mm chromoly spindle for strength and shelf compatibility

  
  


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  Boost/SuperBoost chainlines (52/55 mm) for tire clearance flexibility

  
  


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  SRAM & Shimano compatible, with self-extracting bolts for easy service