e*thirteen Helix R 107 BCD 4-Bolt Chainring
Product Details
The ethirteen Helix R 107 BCD Chainring is designed for 4-bolt 107 BCD cranks, such as SRAM Red or Force, including power meter-equipped cranks. Ideal for gravel and road cyclists, it offers a performance upgrade with increased range and higher top speeds. Available in 38t, 40t, and 42t options, these rings perfectly pair with ethirteen's cassettes to enhance your cycling experience.
Crafted from premium 7075-T7 aluminum, this chainring is CNC sculpted to achieve an optimal stiffness-to-weight ratio, offering both durability and performance. It's compatible with both SRAM and Shimano 11 and 12-speed drivetrains, including flat-top chains. The M4 narrow-wide tooth profile ensures excellent chain retention, reduces wear, and provides reliable performance.
With a 4.8mm offset, the chainline is set by the SRAM crank assembly (45mm for normal width cranks, 47.5mm for wide cranks), offering compatibility with a range of cranks. Whether you're aiming for precision or durability, the Helix R chainring is forged for long-lasting strength, making it a standout choice for serious cyclists.
| Ring Position/Type | Single Ring |
| Tooth Count | 42 |
| Drivetrain Speeds | 11 |
| Drivetrain Speeds | 12 |
| Round or Oval | Round |
| Chainring BCD | 107 |
| Material | Aluminum |
| Color | Black |
| Weight | 81g |
| Defined Color | Black |