Break the Rules

With a 705g frame, the Aethos 2 is the lightest bike in its class. But weight was never the point. Built by breaking racing’s rules to deliver pure road riding bliss, it’s engineered to disappear beneath you: responsive, supple, and sublime. Now with increased tire clearance, refined components, and data-based fit-enhancing geometry, it brings that transcendent ride feel to more riders than ever. Aethos 2 breaks the rules, for the love of the ride.

At a Glance

• Use: Performance Road Riding
• Frameset: 705g FACT 10r Frame / FACT 10r Fork
• Fit: Performance Endurance
• Cockpit & Wheels: Roval Alpinist bar, Pro SL stem, C38 wheels
• Drivetrain: Shimano Ultegra Di2
• Weight: 7.27kg (56cm)

2026 Design & Innovation Award

“If you are after an extremely light, timelessly beautiful and highly versatile road bike, the Aethos 2 is a responsive modern classic that shows its strengths with every turn of the pedals and has earned the praise of our jury.”

So Light, It’s a Crime

The Lightest Road Bike In Its Class, Thanks to Flow State Design Aethos began with a moment of human insight: frames “breath” under load. That subtle rhythm revealed how force moved. We fed this into our supercomputer, evolving tubes into sculpted forms. Shape itself delivered stiffness. The result wasn’t just the lightest road bike in its class and a more perfect ride, it was a new way of making bikes - Flow State Design.

Geometry and Fit Perfected for More Riders

Decades of Body Geometry data, now tuned into a fit that works for more riders than ever. We refined the fit and geometry using data from over 100,000 Body Geometry fits to make long days in the mountains feel even better. Climb faster. Descend harder. Ride longer. You get precise handling in a more versatile and confidence-inspiring package.

More Versatility. More Clearance. No Compromise.

No Gram was Safe from Our Scalpel Aethos 2 clears 35 mm tires with ease. That means smoother, faster rides, more grip, and more roads. That kind of upgrade usually comes at a cost. Not here. We didn’t just create our most optimized layup ever, we re-engineered every detail. No gram was safe from the Specialized Science Club’s obsession.

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At 99 Bikes our priority is to ensure that you are highly satisfied with your purchase. In the unlikely event that you aren't, we offer a 30 day online return policy* in which you can receive a full refund. Any item including bikes (with the exception of food) can be returned to us for any reason provided it is received by us in an unused and resalable condition in or with its original packaging which must be undamaged.

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