Arriving Autumn 2020


Our first carbon fibre composite bike.

Since the beginning of Bird we have known that Carbon would be part of our story.

The question was when, and what?

Designing in Carbon composite presents some unique opportunities.  Frame stiffness can be dramatically increased, and shapes can be achieved that are difficult or impossible when working with metal alloys.

Flatcap Green

Gloss Raw Carbon


Our Aether range of bikes are designed to put the fun back into your trails. They’re true do it all bikes that are just as happy on all day adventures in the mountains as on your local trails.

Introducing 29″ wheels to the Aether range means the 9C carries more speed over rough terrain while maintaining the ride character that makes Aether such fun:

  • Super short back end for playful handling

  • Roomy front end provides stability and comfort

  • Slack head angle boosts downhill confidence

  • Low bottom bracket for carving turns

  • Full Carbon Frame

  • 130mm rear, 130-150mm front suspension

  • 29″ wheels with 2.6″ tyre clearance

  • 65 degree head angle

  • 430mm chainstay

  • 484mm reach on ML size (541mm on XL)

  • BSA Threaded bottom bracket

  • Size specific seat angle – 76.5 to 78 degrees

  • Full internal guided cable routing with internal Y-connector for rear brake on left or right side

  • Suspension kinematics tuned for efficient pedalling and a lively feel

The size specific seat angle is a new development at Bird.  Taller riders need a long seat post, and usually end up  with their weight further back relative to the wheels. This can result in the front wheel lifting up during steep climbs.

The Aether 9C seat angle starts at a traditionally steep 76.5 degrees on the medium and further steepens to 78 degrees on the XL.  This keeps the weight distribution more even across sizes. We also increased the head tube stack on each size to improve rider fit and comfort across the range.

Like to run a water bottle? Aether 9C has the best water bottle clearance of any Bird full suspension frame. Even the smallest size can take a 750ml water bottle and piggyback shock.


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Download Aether 9C Technical Data