e.thirteen Helix R Guidering Chainring, 107 BCD, 4-hole - black

The Helix Race 107 BCD chainring is a high-quality upgrade for gravel and road cyclists using 4-bolt 107 BCD cranks like SRAM ® XPLR or power meter cranks like Quarq Force or Rival. Take full advantage of e*thirteen's largest cassette range by reducing the chainring size by two or more teeth with 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 stiffness, lightweight, and chain retention performance. Black and gray color options to match 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 absolute freedom in setup. The chainline is determined by the SRAM® crank assembly, 45 mm for standard width cranks, 47.5 mm for wide width cranks.  

Features:

• CNC-milled, lightweight chainring
• Material: forged 7075-T7 aluminum
• Bolt circle diameter: 107mm
• Chainline: 45mm
• Compatible with SRAM™ and Shimano™ 11/12-speed drivetrains
• Teeth: 38, 40, 42 T.
• Weight: 71g (32 T.)