# e*thirteen Helix R 107 BCD 4-Bolt Chainring - 42t 11/12-Speed 107BCD Black

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
    
    42
    
    Drivetrain Speeds
    
    12
    
    Round or Oval
    
    Round
    
    Chainring BCD
    
    107
    
    Material
    
    Aluminum
    
    Color
    
    Black
    
    Weight
    
    81
    
    Defined Color
    
    Black
    
    Teeth
    
    42T

## Details

- **Price:** 79.95 USD
- **Vendor:** Gio's Outdoors
- **Type:** Chainrings
- **Tags:** Gio's Outdoors, Shopify Collective

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 79.95 USD | In stock |

## Images

- e*thirteen Helix R 107 BCD 4-Bolt Chainring - 42t 11/12-Speed 107BCD Black

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> Source: [Smart supply deals](https://smartsupplydeals.com/products/e-thirteen-helix-r-107-bcd-4-bolt-chainring-42t-11-12-speed-107bcd-black)
> Updated: 2026-07-22