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A black absoluteBLACK Round Boost Chainring for Cannondale against a white background.

absoluteBLACK Chainrings

absoluteBLACK Round Boost Chainring for Cannondale

Niel Ubod July 30, 2025

$89.95

Lightweight and stiff chainring for Cannondale Hollowgram cranksets

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absoluteBLACK Round Boost Chainring for Cannondale

The absoluteBLACK Round Boost Chainring for Cannondale is a lightweight and stiff chainring made from 7075-T6 aluminum. It is compatible with Cannondale Hollowgram cranksets and both Ai/FSi-i and non-Ai/FS-i frames. This chainring features a narrow-wide teeth profile and a unique look that is like no other MTB chainring out there!

 

Advantages to aB Direct Mount Rings

  • Unique anodized finish and great quality
  • Excellent weight to strength ratio
  • Patent Pending alternate wide-narrow tooth profile to keep your chain in place
  • 3D machining for mud relief, decreased wear and quieter operation
  • Less weight as you don’t need spider and chainring bolts
  • The ability of run smaller chainring sizes

Compatibility

  • Crankset: Compatible with Cannondale Hollowgram Si, SISL, SiSL2 and FSA SL-K, afterburner and Comet cranksets
  • Chain: These chainrings are designed to work with all 9-speed, 10-speed, and 11-speed chains. They also work with 12-speed Eagle and 12-speed KMC chains
  • Frame: Compatible with Ai/FS-i and non-Ai/FS-i frames. For non-Ai/FS-i frames, you will need to adjust the spacers on the drive-side of your bike as this chainring uses 3 mm less offset than the original non-Ai Cannondale chainring/spider

Specs

  • Color: Black
  • Interface: Cannondale Hollowgram Direct Mount
  • Offset: 3 mm
  • Chainline: 52 mm Boost
  • Material: CNC machined 7075 aluminum
  • Weight: 28T - 55 grams | 30T - 56 grams | 32T - 57 grams | 34T - 70 grams
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