The e*thirteen Helix R 107BCD Chainring, designed for 4-bolt 107BCD 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

Product Specifics

• Ring Position/Type: Chain Retaining Single Ring
• Tooth Count: 42
• Drivetrain Speeds: 11
• Drivetrain Speeds: 12
• Round or Oval: Round
• Chainring BCD: 107
• Material: Aluminum
• Color: Black
• Weight: 81
• Defined Color: Black

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Today's Stock Status

5 Available to ship in 2-4 Business Days

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UPC: Not available
EAN: 4711280340996
Manufacturer Part Number: CR4HRA-150
CR4212
183057-Q0-L

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