e*thirteen Helix R 107 BCD 4-Bolt Chainring - 40t, 11/12-Speed, 107BCD, Black

MPN: CR4HRA-149 · UPC: 4711280340989

$79.95

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🏪 Free pickup: 26 Essex St (Rear), Andover MA · 978-270-4895

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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

Ring Position/Type	Chain Retaining Single Ring
Tooth Count	40
Drivetrain Speeds	12
Round or Oval	Round
Chainring BCD	107
Material	Aluminum
Color	Black
Weight	74
Defined Color	Black