Helix Race 107 BCD Chainring

Regular price $79.95
Regular price Sale price $79.95
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Brand: e*thirteen
SKU: CR4HRA-149
Regular price $79.95
Regular price Sale price $79.95

Product information


The e*thirteen Helix Race 107 BCD Chainring, designed for 4-bolt 107 BCD cranks like SRAM Red or Force including power meter equipped cranks, offers a performance upgrade for Gravel and Road cyclists. The 38, 40, and 42 tooth rings pair perfectly with e*thirteen’s cassettes for more overall range and higher top speeds. Made from durable premium 7075 alloy, they're CNC sculpted for a high stiffness-to-weight ratio. Compatible with both SRAM and Shimano 11 and 12-speed drivetrains. Chainline is set by SRAM® Crank assembly.


  • Compatible with 4-bolt 107 BCD SRAM® cranks and Quarq® power meter cranks
  • M4 narrow-wide tooth profile provides Shimano and SRAM 11/12-speed chain compatibility (Including flattop chains), excellent chain retention, and reduced wear
  • 4.8mm offset (Chainline is determined by SRAM® Crank assembly, 45mm for normal width cranks, 47.5mm for wide cranks)
  • Forged from premium 7075-T7 aluminum, then extensively CNC optimized for light weight, and technical aesthetics
  • Durable 7075-T7 construction for long wear-life, stiffness, and strength