ethirteen Helix Core Alloy Cranks

ethirteen Helix Core Alloy Cranks Info

The Helix Core Alloy Cranks from ethirteen are engineered to deliver trail-friendly weight with true enduro-level strength, all at a price point that punches well above its class. Built around a proven forged alloy platform, these cranks are designed for riders who want reliability and compatibility without unnecessary complexity or cost.

The crank arms are forged from AL6066-T6 aluminum and shaped with weight-saving features directly in the mold, resulting in a clean, minimalist profile before any machining begins. Strategic CNC finishing further trims excess material while preserving stiffness where it matters most. Paired with a heat-treated 24mm chromoly spindle, the Helix Core strikes an ideal balance between durability, bearing longevity, and ride feel—equally comfortable on long singletrack days or repeated bike park laps.

Helix Core Alloy Cranks Specs at a Glance

• Crank Arm Material: Forged AL6066-T6 aluminum.
• Spindle: 24mm heat-treated chromoly.
• Crank Lengths: 165mm, 170mm, 175mm.
• Spindle Length: 73mm.
• Weight: 589g (170mm).
• Drivetrain Compatibility: SRAM and Shimano 11- and 12-speed systems.
• Chainline Support: Boost and SuperBoost (with compatible Helix chainrings).

Design Benefits

1. Enduro-Rated Strength: Forged AL6066 construction delivers durability for aggressive riding and impacts.
2. Efficient Weight Reduction: Molded shaping and CNC refinement reduce mass without compromising stiffness.
3. Broad Compatibility: Works seamlessly with both SRAM and Shimano drivetrains.
4. Quick Connect Interface: Proven spindle interface minimizes creaks and simplifies installation.
5. Self-Extracting Bolts: Makes removal and servicing fast and frustration-free.

Compatibility & Setup Notes

The Helix Core Alloy Cranks are designed to pair with ethirteen Helix Race or Helix Chainrings, featuring a flip-flop design to achieve either Boost or SuperBoost chainlines depending on configuration. Chainrings are sold separately and available in a range of sizes and anodized colors. This crankset is intended for standard mountain bike applications; riders seeking Shimano motor compatibility should look to ethirteen’s e*spec crank options.

Final Take

The Helix Core Alloy Cranks are an excellent choice for riders who want dependable performance without paying for unnecessary frills. Light enough for all-day trail riding, strong enough for enduro abuse, and compatible across multiple drivetrain standards, they deliver real-world value with ethirteen’s proven engineering behind them.