Specialized

Aethos 2

The Aethos 2 is built for riders who live for the moments when the bike disappears and the ride takes over. At just 595 grams, it is the lightest production road frame in the world, but the magic is not in the number. It is in the way the bike dances up climbs, floats through corners, and hums across rough roads with an effortless rhythm. With refined geometry drawn from decades of fit data, clearance for 35mm tires, and an all-new Roval Alpinist cockpit and wheelset, the Aethos 2 expands its legendary ride feel to more cyclists than ever before.

Engineered through Flow State Design, every curve of the Aethos 2 has been tuned to channel energy, creating a ride that feels alive yet balanced. Complete builds tip the scales under six kilograms, but the real weightlessness comes when the frame simply melts away beneath you. It is timeless in silhouette, elegant in execution, and transcendent in motion. For those who chase the sensation of freedom on two wheels, the Aethos 2 is more than a bike—it is the purest expression of joy on the road.

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Features

A Rule Breaker

A Rule Breaker

The Aethos isn't all about weight but it does play a big role in the bikes design. The S-Works 12r Aethos 2 frame weighs in at 595 grams and the 10r frame sits at 705g, both in size 56cm.

The frame isn't the only thing that saw a weight reduction. Specialized optimized the seat post clamp, BB cups, the UDH, and the brake mounts to save another 19 grams to help Specialized build their lightest disc brake road bike yet.

More than a Lightweight

More than a Lightweight

The Aethos is more than just light; it's built to be the ultimate riding road bike. It's geometry and carbon lay up have both been revised to give a more comfortable ride. With a taller stack height for reduced pressure on the hands, a lower BB height for improved cornering, and a longer wheelbase for stability the Aethos 2 is built to be fast, stable, and comfortable.

So Much Tire Clearance

So Much Tire Clearance

More tire volume means smoother, faster rides, more grip, and access to more roads. Aethos 2 clears 35 mm tires with ease, unlocking new versatility without sacrificing weight or feel.

Geometry

49 52 54 56 58 61
A Reach 373 377 384 391 398 404
B Stack 522 538 559 580 606 627
C Head Tube Angle 71.4° 72.1° 72.5° 73° 73° 73.5°
D Front Centre 581 584 594 599 614 621
E Bottom Bracket Drop 76.5 76.5 75 75 73.5 73.5
F Wheelbase 978 981 992 998 1013 1020
G Chainstay Length 410 410 410 410 410 410
H Head Tube Length 114 128 150 169 198 218
I Top Tube Length 508 526 544 557 572 584
J Seat Tube Angle 74° 74° 74° 74° 75.5° 74.5°
K Standover Height 719 737 759 779 805 834
All measurements in degrees or millimetres

Sizing Guide

The sizing chart is a great place to start when picking your next bike but everyone will fit a bike a bit differently. Your torso, arm, and leg lengths all play into what size of bike you may need. Plus, there's your own personal preference.

We always recommend swinging by the shop and taking the bike that you're looking for a spin to see how it feels. If you're unable to come by, looking at the geometry of your current bike and comparing it is a good place to start. If you have any further questions, our customer service team is there to help.

Size Height
Imperial Metric
49 5'1" - 5'5" 155 - 163cm
52 5'4" - 5'7" 163 - 170cm
54 5'7" - 5'9" 170 - 175cm
56 5'9" - 5'11" 175 - 180cm
58 5'11" - 6'2" 180 - 188cm
61 6'2" - 6'5" 188 - 196cm

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