Ethirteen
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Product Description
e*thirteen Helix Race GR Chainrings – Gravity Optimized for Downhill, Bikepark & Freeride
Built for the toughest gravity disciplines, the Helix Race GR Chainring is precision-engineered to pair with Helix Race GR cranks and withstand the punishment of downhill, freeride, and bike park riding.
Crafted from forged AL 7075-T6 aluminum and CNC-machined for the perfect balance of stiffness, low weight, and clean aesthetics, this chainring delivers uncompromising performance on long-travel bikes.
Designed with a -7mm offset, it produces a 56.5mm chainline when paired with Helix Race GR cranks with an 83mm spindle. The Quick Connect Direct Mount spline ensures secure, creak-free installation.
Featuring the updated M4 narrow-wide tooth profile, the GR Chainring provides:
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Improved chain retention
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Reduced noise
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Decreased drivetrain wear
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Seamless compatibility with Shimano® and SRAM® drivetrains (including T-Type®)
✅ Key Features:
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Sizes: 34T
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Colors: Sterling Silver
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Material: AL 7075-T6 (forged & CNC’d)
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Chainline: 56.5mm (-7mm offset)
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Optimized for: Helix Race GR cranks (83mm spindle)
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Gravity ready: Downhill, freeride & bikepark proven
⚠️ Note: Helix Race GR Chainrings are designed for 83mm spindle cranks. For 73mm cranks, use the standard Helix Race Chainring.

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