The earth-shatteringly lightweight Specialized Aethos has very quickly added two new models. They’re more affordable, and they’re both still really light. The Aethos Pro and Aethos Expert road bikes share the same new molds and tube shapes, but use a slightly more standard layup to bring prices starting at less than half of the S-Works’ $12,500 sticker.

Part of the price drop comes from stepping the groups down a notch, to Shimano Ultegra Di2 and SRAM Force eTap, but it’s still only spec’d with electronic shifting. That, and the spec across the bike becomes a little more “normal”. But, there are some key differences with the carbon, so we’ll start there…

What’s different between S-Works and Pro/Expert Aethos?

new specialized aethos lightweight carbon road bike in expert build trim and ice blue fade paint scheme

Do the different Aethos models have different frames? Well, yes and no. They’re made in the same molds, and use all the same tube shapes. And the technology story is basically the same, so we recommend checking out the Aethos S-Works launch coverage to get a sense of what makes this bike special.

The key differences between the Aethos S-Works bikes and the Pro & Expert models is the quality and quantity of carbon used, and the addition of ports for mechanical shift cables.

To accomplish the latter, they placed a cable entry port near the front of the downtube, added a window in the BB area to guide routing and provide an exit for the front derailleur cable, and a cable stop for the rear that bolts into a hidden threaded insert (the cable runs externally from the BB, under the chainstay).

new specialized aethos lightweight carbon road bike in expert build trim and red tint paint scheme

The S-Works bikes use FACT 12r carbon, Specialized’s best material, with an absolute minimum of overlap or “lazy fibers” that aren’t directly under tension and serving a purpose.

With the Pro and Expert models, they step it down to FACT 10r carbon. Which, honestly, used to be the top level a few years ago, so it’s not much of a downgrade. But, there’s a bit more ply overlap, and less of the expensive high modulus material, which results in slightly thicker tube walls.

The result is a size 56 painted frame that comes in at a claimed 699g. That’s only 134g heavier than the much, much more expensive S-Works models, and still lighter than most anything else out there. It has the same 275lb rider weight limit, and, Specialized says, the same ride quality and stiffness as the S-Works bikes.

Specialized Aethos road bike specs, pricing & weights

new specialized aethos road bike with sram force etap axs build spec in dark metallic blue color

One of the really nice features of this bike is the lack of proprietary spec. In fact, about the only thing that’s truly proprietary is the front brake mount. The launch coverage shows a fork cutaway diagram as an example, but, basically, by creating a custom flat mount adapter specifically for 160mm rotors, they shaved about 20 total grams out of the system.

You can even remove the front derailleur hanger if you’re building up the frameset with a 1x drivetrain. Just add the included cover plate and you’ll still save a few more grams.

Other things that make ownership easy include a standard BSA threaded bottom bracket, standard tapered headtube, standard stem and steerer interface, and standard 12×100 and 12×142 thru axles with standard flat mount disc brakes. It’s almost like a good ol’ regular… wait for it …road bike. Only lighter. And with 700×32 tire clearance.

Specialized Aethos prices, specs & weights

new specialized aethos road bike with sram force etap axs build spec

new specialized aethos road bike with sram force etap axs build spec in pink blush rose color

The Aethos Pro comes in two versions, one with SRAM Force eTap AXS (shown above) and one with Shimano Ultregra Di2 (below), each available in dark metallic blue or blush rose colors.

Both cost $7,400 and come equipped with the Roval Alpinist CL wheelset with Turbo Gripton 700×26 tires, neither of which are tubeless ready. The cockpit is an Alpinist seatpost, Specialized Power Pro saddle, and S-Works Carbon handlebar and alloy stem.

Aethos Expert model claimed weights are 6.82kg (15.06lb) for the Force build, and 6.58kg (14.5lb) for Ultegra.

new specialized aethos lightweight carbon road bike in expert build trim and ice blue fade paint scheme

The Specialized Aethos Pro comes in Ice Blue Fade and Red Tint Carbon, both built with Shimano Ultegra Di2 and retailing for $5,200.

new specialized aethos lightweight carbon road bike in expert build trim and red tint paint scheme

Spec changes include a Specialized Expert alloy handlebar and DT Swiss R470 wheels, with a Power Expert saddle. But, it keeps the top-level Alpinist seatpost and S-Works Turbo Gripton 700×26 tires. Claimed weight is 7.41kg (16.31lbs).

An Aethos 10r frameset, which includes the fork, headset and Alpinist seatpost, retails for $3,200.

So, how does it ride? We just got our test bike built & weighed (it’s light!), stay tuned for a review…

Specialized.com

11 COMMENTS

    • @caliente: Butyl is more showroom-friendly. Dealers don’t want to have to explain to dentists why tires are flat on all the expensive bikes on the sales floor.

    • It’s already in the article. “An Aethos 10r frameset, which includes the fork, headset and Alpinist seatpost, retails for $3,200.”

      The S-Works Aethos supposedly uses FACT 12R carbon.

    • Also, it looks like you could get the ultegra model and swap the wheels for the Dt Swiss Mon Chasseral and get it down to 14.28 lbs for the 56. It’d be fun to take for a spin up some of the cat 1 and HC climbs I’ve got around here. now if only I could convince to wife to let me spend the money on bike rather than moving to a nicer house…. 😛

  1. I saw that, yet also noticed that the Aethos 10r frameset does not appear on the Specialized website, whereas all other Aethos models do appear (as well as an S-Works frame only). Hence my question.

  2. I like this. No gimmicks, nothing extra. Would be nice if they would in the future release a sub 3000 $ version too with a mechanical groupset and possibly a bit more affordable frameset.

COMMENT HERE: (For best results, log in through Wordpress or your social media account. Anonymous/fake email comments may be unapproved or deleted. ALL first-time commenter's posts are held for moderation. Check our Comment Policy for full details.)

This site uses Akismet to reduce spam. Learn how your comment data is processed.