Specialized Aethos 2 Pro Bike (2026)

Specialized Aethos 2 Pro Road Bike - Shimano Ultegra Di2, 2026, Red. Manufacturer reference: 97226-1154

The lightest production bike in its class. Designed to deliver the perfect experience to more riders.

With a 705g frame, the Aethos 2 is the lightest bike in its class. But weight was never our primary focus. We actually built it with another goal: to break the rules of competition so that road riding is a true pleasure. It's designed to disappear beneath you. It's responsive, supple, and simply sublime. Now with increased tire clearance, refined components, and data-driven geometry for an improved fit. So more riders can experience what it feels like to ride it. The Aethos 2 breaks the rules for the love of the road.

TECHNICAL SPECIFICATIONS

Box

• Frame: Aethos 2 FACT 10r Carbon, Rider First Engineered™, Threaded BB, Hidden Cable Routing, 12x142mm thru-axle, flat-mount disc
• Fork:Aethos 2 FACT 10r Carbon, 12x100mm thru-axle, flat-mount disc

Brakes

• Front brake: Shimano Ultegra BR-R8170, hydraulic disc
• Rear brake:Shimano Ultegra BR-R8170, hydraulic disc

Transmission

• Shift levers: Shimano Ultegra Di2 R8170, hydraulic disc
• Front derailleur: Shimano Ultegra Di2 R8150, braze-on
• Rear derailleur: Shimano Ultegra Di2 R8150, 12-speed
• Cassette:Shimano Ultegra, 12-speed, 11-30t
• Chain:Shimano XT M8100, 12-speed w/ quick link
• Crankset:Shimano Ultegra R8100 with 4iiii Precision 3+ single-sided Power Meter, 52/36t
• Bottom Bracket:Shimano Threaded BSA BB

Wheels and tires

• Front Tire: S-Works Turbo TLR Race Tire, 700x28c
• Front wheel:Roval Alpinist CL II, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes, Tubeless Ready
• Rear Tire: S-Works Turbo TLR Race Tire, 700x28c
• Rear wheel: Roval Alpinist CL II, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes, Tubeless Ready
• Cameras: 700x25-35, 50mm Presta Valve, TPU

Cockpit

• Handlebar: Roval Alpinist Cockpit II, Integrated Bar/Stem
• Tape Handlebar:Supacaz Super Sticky Kush
• Saddle:Power Pro Mirror, Hollow Ti rails
• Seatpost: Roval Alpinist Carbon Seatpost
• Seat clamp: Specialized Alloy, 30mm

Product details

• Product identifier: 279155

Weight

• Weight: 6.73 kg (14 lb, 13.4 oz), tubeless
• Size:56