Aluminum

The Helix Race 107 BCD chainring is a premium quality upgrade for gravel and road cyclists who use 4-hole 107 BCD cranks like SRAM ® XPLR or power meter cranks like Quarq Force or Rival. Take full advantage of e*thirteen's largest range of cassettes by reducing the chainring size by two or more teeth on our smaller 38, 40 and 42 tooth sizes. A combination that supports steeper climbs and faster descents. Helix Race 107 BCD rings are forged from durable 7075 alloy and CNC optimized for rigidity, light weight and chain holding performance. Black and gray color options to coordinate with e*thirteen 9-45T and 9-50T cassettes. Like all e*thirteen chainrings, they feature cross-compatible tooth profiles and allow seamless switching between SRAM ® or Shimano ® 11 and 12-speed drivetrains for com.