SKU: 79424043988

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

Sale price$64.76 Regular price$71.95
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Description

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

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: 40
  • Drivetrain Speeds: 11
  • Drivetrain Speeds: 12
  • Round or Oval: Round
  • Chainring BCD: 107
  • Material: Aluminum
  • Color: Black
  • Weight: 74
  • Defined Color: Black



Today's Stock Status





UPC: Not available
EAN: 4711280340989
Manufacturer Part Number: CR4HRA-149
CR4211
183056-Q0-L



Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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SKU: 79424043988

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4.8 ★★★★★
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Product Reviews
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whodg
Draper, US
★★★★★ 5
Awesome tool
Very easy to use, only issue I had was the location pin was a bit tight. Chucked it in the drill and polished it up with a scotch-brite and it worked perfectly. The end to end symmetry made it easy to move from one side to the other. Good price as well!
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Reviewed in the United States on September 24, 2024
R
Verified Purchase
Road Warrior Ray
Chelsea, US
★★★★★ 4
Excellent 11 hole jig
Size: 11 Holes
This jig worked excellently. It doesn't have any instructions, so I watched the video of it. I set it up the way the video showed, and I got decent results. Deducted a star since no instructions.
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Reviewed in the United States on April 18, 2026
J
Verified Purchase
Janis E White
Los Angeles, US
★★★★★ 5
Perfect hole placement
Size: 11 Holes
Worked exactly as described.
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Reviewed in the United States on September 24, 2025
J
Verified Purchase
Jeffrey A Bradley
Los Angeles, US
★★★★★ 5
Good jig
Size: 11 Holes
The jig itself is great. The markings make it easy to be consistent; the design is well thought-out; and the build quality is good. I would recommend replacing the drill bit, though. A nice brad point will serve you better.
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Reviewed in the United States on December 5, 2025
W
Verified Purchase
WhiteTiger96
Lexington, US
★★★★★ 5
Great
Size: 11 Holes
Worked better than expected
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Reviewed in the United States on March 10, 2026

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